Find research datasets worth reusing

Chang'e 5 RF recording at 8478.6 MHz with Allen Telescope Array during LOI-2

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-29 before and during the LOI-2 (lunar orbit injection 2) manoeuvre that circularized the spacecraft's elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 240 ksps for each channel. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8478.6 MHz, which corresponds to the lander, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. Note: during the observation, the frequency of the RFCB LO was lowered by exactly 30 kHz in two occasions to prevent the signals from drifting out of the channel passband due to Doppler. The two LO jumps can be easily seen in the residual carrier of the signals and corrected.

Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array during LOI-2

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-29 before and during the LOI-2 (lunar orbit injection 2) manoeuvre that circularized the spacecraft's elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 240 ksps for each channel. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8486.2 MHz, which corresponds to the orbiter, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. Note: during the observation, the frequency of the RFCB LO was lowered by exactly 30 kHz in two occasions to prevent the signals from drifting out of the channel passband due to Doppler. The two LO jumps can be easily seen in the residual carrier of the signals and corrected.

Chang'e 5 RF recording at 8463.7 MHz with Allen Telescope Array before LOI-1 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-28 before the LOI-1 (lunar orbit injection 1) manoeuvre that inserted the spacecraft into an elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8463.7 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used an external 10 MHz reference and PPS coming from the observatory distribution system. The IQ sample rate of the USRP was 1.92 Msps. A GNU Radio flowgraph was used to record IQ samples to disk. The GNU Radio flowgraph stored the IQ data for each channel as 16-bit integers in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the Y polarization. The original metadata headers are also provided. The X polarization can be found in <a href="https://zenodo.org/record/4315066">this dataset</a>.

Chang'e 5 RF recording at 8463.7 MHz with Allen Telescope Array before LOI-1 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-28 before the LOI-1 (lunar orbit injection 1) manoeuvre that inserted the spacecraft into an elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8463.7 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used an external 10 MHz reference and PPS coming from the observatory distribution system. The IQ sample rate of the USRP was 1.92 Msps. A GNU Radio flowgraph was used to record IQ samples to disk. The GNU Radio flowgraph stored the IQ data for each channel as 16-bit integers in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the X polarization. The original metadata headers are also provided. The Y polarization can be found in <a href="https://zenodo.org/record/4317087">this dataset</a>.

Chang'e 5 RF wideband recording with Allen Telescope Array before LOI-2 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-29 before the LOI-2 (lunar orbit injection 1) manoeuvre that circularized the spacecraft's elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used an external 10 MHz reference and PPS coming from the observatory distribution system. The IQ sample rate of the USRP was 40.96 Msps. A GNU Radio flowgraph was used to record IQ samples to disk. The GNU Radio flowgraph stored the IQ data for each channel as 16-bit integers in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the Y polarization. The original metadata headers are also provided. The X polarization can be found in "<a href="https://zenodo.org/record/4317366">Chang'e 5 RF wideband recording with Allen Telescope Array before LOI-2 (X polarization)</a>".

Chang'e 5 RF wideband recording with Allen Telescope Array before LOI-2 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-11-29 before the LOI-2 (lunar orbit injection 1) manoeuvre that circularized the spacecraft's elliptical lunar orbit. The recording was done at Allen Telescope Array using antenna 1h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 1h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used an external 10 MHz reference and PPS coming from the observatory distribution system. The IQ sample rate of the USRP was 40.96 Msps. A GNU Radio flowgraph was used to record IQ samples to disk. The GNU Radio flowgraph stored the IQ data for each channel as 16-bit integers in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the X polarization. The original metadata headers are also provided. The Y polarization can be found in "<a href="https://zenodo.org/record/4323363">Chang'e 5 RF wideband recording with Allen Telescope Array before LOI-2 (Y polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array between TEI-1 and TEI-2 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-12, between the TEI-1 (trans-Earth injection 1) manoeuvre that moved the spacecraft to an elliptical lunar orbit and the TEI-2 manoeuvre that ejected the spacecraft away from lunar orbit. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz channel contains a signal from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, which corresponds to the orbiter, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The Y polarization can be found in "<a href="https://zenodo.org/record/4341911">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array between TEI-1 and TEI-2 (Y polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array between TEI-1 and TEI-2 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-12, between the TEI-1 (trans-Earth injection 1) manoeuvre that moved the spacecraft to an elliptical lunar orbit and the TEI-2 manoeuvre that ejected the spacecraft away from lunar orbit. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz channel contains a signal from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, which corresponds to the orbiter, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the Y polarization. The X polarization can be found in "<a href="https://zenodo.org/record/4331733">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array between TEI-1 and TEI-2 (X polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array after TEI-2 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-13, after the TEI-2 manoeuvre that ejected the spacecraft away from lunar orbit. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz channel contains a signal from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, which corresponds to the orbiter, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the Y polarization. The X polarization can be found in "<a href="https://zenodo.org/record/4347577">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array after TEI-2 (X polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array after TEI-2 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-13, after the TEI-2 manoeuvre that ejected the spacecraft away from lunar orbit. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz channel contains a signal from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, which corresponds to the orbiter, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The Y polarization can be found in "<a href="https://zenodo.org/record/4362098">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array after TEI-2 (Y polarization)</a>".

Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array on 2020-12-20

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-20, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8486.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the both the X and Y polarizations.

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array on 2020-12-20

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-20, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the both the X and Y polarizations.

Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array on 2020-12-19 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-19, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8486.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The Y polarization can be found in "<a href="https://zenodo.org/record/4405177">Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array on 2020-12-19 (Y polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array on 2020-12-19 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-19, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The Y polarization can be found in "<a href="https://zenodo.org/record/4395190">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array on 2020-12-19 (Y polarization)</a>".

Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array on 2020-12-19 (Y polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-19, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8471.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The X polarization can be found in "<a href="https://zenodo.org/record/4393318">Chang'e 5 RF recording at 8471.2 MHz with Allen Telescope Array on 2020-12-19 (X polarization)</a>".

Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array on 2020-12-19 (X polarization)

This dataset contains a recording of X-band telemetry signals from the Chinese lunar sample retrieve mission Chang'e 5 done on 2020-12-19, after the Earth flyby, in a direct trajectory to the Sun-Earth L1 Lagrange point. The recording was done at Allen Telescope Array using antenna 2h in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2h was connected to RFCB LO d, which was tuned to a frequency of 8475 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 30.72 Msps and a GNU Radio flowgraph was used to channelize four frequencies from the spacecraft (8463.7, 8471.2, 8478.6 and 8486.2 MHz), using an IQ sample rate of 480 ksps for each channel. Only the 8471.2 MHz and 8486.2 MHz channels contains signals from the spacecraft. The GNU Radio flowgraph stored the IQ data for each channel as 32-bit floats in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted 16-bit integers and <a href="https://github.com/gnuradio/SigMF">SigMF</a> format. This dataset contains the IQ data for the channel at 8486.2 MHz, in SigMF format. Each polarization is in a different file. The original metadata headers are also provided. This dataset contains the X polarization. The Y polarization can be found in "<a href="https://zenodo.org/record/4405179">Chang'e 5 RF recording at 8486.2 MHz with Allen Telescope Array on 2020-12-19 (Y polarization)</a>".

Low surface brightness observations with the Roman Telescope: The intracluster light

There is a huge amount of astrophysical events that remain barely studied due to the lack of large, deep surveys. These events are those which are very faint and extend over large areas of the sky. For instance, only a handful of galaxy clusters have been observed with enough depth to witness the intracluster light (ICL), made up of stars that drift freely between galaxies in the cluster. This light is key to understanding the assembly mechanisms occurring inside galaxy clusters. However, little is known about this light as it is very difficult to observe due to its low surface brightness. The availability of deep surveys, such as the Hubble Frontier Fields, have expanded our knowledge of the properties, and therefore the origin, of the ICL. However, larger samples are needed to understand the evolution of this component with time and the efficiency of the different evolutionary processes inside galaxy clusters. WFIRST appears as a unique tool to investigate the evolution of the ICL with time. Observing in the IR, brings the advantage that the stellar populations of the ICL are brighter in those wavelengths and their evolution with time is less dramatic compared to the optical bands, making studies of the fraction of ICL with redshift more consistent. In this talk, I will present the latest advances in our understanding of the ICL.  I will also talk about the lessons learned using this magnificent dataset that can be applied in future observations of the ICL with WFIRST.

opencc-byJul 2021View details →

Vintage telescope

Source: Objaverse 1.0 / Sketchfab

opencc-by-4.0Dec 2021View details →

Queqiao recording with Allen Telescope Array on 2021-09-19

This dataset contains a recording of the S-band telemetry downlink from the Queqiao Chang'e 4 relay satellite in orbit around the Earth-Moon L2 Lagrange point. The recording was done on 2021-09-19 at Allen Telescope Array using antenna 2e in dual XY (linear) polarization. The hardware configuration was as follows: antenna 2e was connected to RFCB LO d, which was tuned to a frequency of 2234.5 MHz and used an output IF of 512 MHz. A USRP N321 was connected to the IF output of the RFCB and digitized both polarizations. The USRP used external 10 MHz reference and PPS coming from the observatory distribution system. The IQ  sample rate of the USRP was 480 ksps and a GNU Radio flowgraph was used to record IQ data to disk. The GNU Radio flowgraph stored the IQ data for each channel as 16-bin integers in the <a href="https://wiki.gnuradio.org/index.php/Metadata_Information">GNU Radio metatata file format</a>, with detached headers. After recording, the data was converted to <a href="https://github.com/gnuradio/SigMF">SigMF</a> format.