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opencc-by-4.0Apr 2020View details →

WWV Doppler Shift Recording by AD8Y, 5 MHz, no GPSDO

Doppler shift data from WWV on 5 MHz. Callsign: AD8Y Radio: Kenwood TS-450 GPSDO: No Antenna: Random wire vertical Coordinates: (41.4067594 -75.6675467) Elevation: 914.8 feet Notes: The TXCO is intermittently calibrated against a GPSDO, but the system cannot be run off the GPSDO because signal leakage from it overwhelms the signal from WWV. Data collection was interrupted on some dates, including 31 December 2019 and 16 January 2020.    This dataset is part of the Frequency Analysis Network project, collected according to the same process as the data for the Festival of Frequency Measurement (10.5281/zenodo.3707210).

opencc-by-4.0Dec 2021View details →

December 2021 Eclipse Monitoring of WWV at 5 MHz and 10 MHz by K1FR Using FlexRadio 6700/GPSDO and fldigi

This dataset contains observations of WWV at 5 and 10 MHz gathered from December 1 through 10, 2021 as part of the study of the effects of solar eclipses on the ionosphere. The data was collected by amateur radio station K1FR located at 38.828, -77.104 using a FlexRadio 6700 with GPSDO connected to a long wire antenna. The fldigi application was used to analyze and record the received frequency of the WWV station at one second intervals. The dataset includes .CSV files of these measurements. Three independent receivers were created within the 6700 - one for 5 MHz and two for 10 MHz. The first two receivers' data are included in this dataset. Files named analysis_xxxxx-K1FR-1 are for 10 MHz, and those named analysis_xxxxx-K1FR-2 are for 5 MHz. The third independent receiver was used to capture realtime audio from WWV at 10MHz which will be included in a separate dataset.

Festival of Frequency Measurement 1 October 2019 for WWV 5 MHz - Toby Haynes VE7CNF

Festival of Frequency Measurement 1 October 2019 for WWV 5 MHz Toby Haynes VE7CNF Location:    49.266918N   122.900887W   Grid CN89ng   Burnaby, BC, Canada Start Time:  2019 Sept 30 at 23:58 UTC End time:    2019  Oct  2 at 00:02 UTC Antenna:     "Inverted L" vertical with ICOM AH-4 auto tuner, 50 ft high, 70 ft horizontal top wire. Receiver:    ICOM IC-7410 with internal TCXO reference and internal USB sound card chip with separate clock crystal.             Receiver in USB mode with carrier frequency 4998.5 kHz to give a 1500 Hz audio tone for the WWV 5 MHz carrier. Measurement:  1500 Hz tone frequency estimated using program FLDigi v4.1.08 in frequency analysis mode. There was a drop in the WWV 5 MHz signal level around 15:00 UTC, after which the reduced SNR caused more variation in the FLDigi frequency measurements. Frequency calibration: Before and after the data set, the receiver frequency error was determined by using the receiver and FLDigi to measure a reference 5 MHz sine wave from a Rigol DG1032 function generator with external 10 MHz GPS-disciplined frequency reference (Trimble). The "VE7CNF raw_2019-09-30-1810 UTC.csv" file includes the reference measurements and the data set. The two reference signal measurements were:    Receiver frequency error +0.066 Hz averaged for 1 minute starting 2019 Sept 30 at 18:10:25 UTC     Receiver frequency error +0.028 Hz averaged for 1 minute starting 2019  Oct  2 at 00:03:10 UTC Receiver frequency error at each time during the data set was then estimated, assuming that the error changed linearly over time betwen the two reference measurements. The estimated receiver frequency errors were applied to correct the data set in "VE7CNF CN89ng 5 MHz_2019-09-30-2358 UTC.csv." The measured WWV 5 MHz frequency error vs time is graphed in "VE7CNF_WWV5MHz_2019-10-01UTC.JPG," with a moving 1-minute average applied to the frequency error. The frequency dropped around 01:30 (local sunset was 01:51 UTC) and increased around 14:00 (local sunrise was 14:13 UTC).

WWV 5 MHz

Festival of Frequency Measurement 01 October 2019 Event : WWV Centennial UTC date : 01 October 2019 Beacon Frequency : 5 MHz Submitter : Martin H Potter, VE3OAT Data recorded at : 45.2525N 75.5910W City : Greely Region : Ontario, CANADA WARNING : Data recorded during 1330-2230 UTC considered NOT USEFUL/INVALID due    to weak or non-existent signal reception.        Data file : VE3OAT 45.25 -75.59 5 MHz.csv Data start time : 2019 Sep 30 23:56 UTC Antenna : 80/40 m band inverted-V dipoles with common feed Antenna orientation : NW-SE Receiver : Yaesu FTdx1200 transceiver Frequency reference : internal, undisciplined Receiver mode : USB IF bandwidth : 1800 Hz AGC : fast Digital Noise Reduction (DNR) : off Frequency measurement method : Reciever in USB mode tuned to 4999.000 kHz,    audio output to computer sound card, frequency measured and recorded by    Fldigi v4.1.06 software. Computer sound card : calibrated by Fldigi "WWV" function Observation : At 0345 UTC, rapid "flutter" fading of the signal was noted with    smearing of the displayed signal frequency.

opencc-by-4.0Sep 2019View details →

WWV Centennial N1IRO 5 MHz Recording

Festival of Frequency Measurement 1 October 2019 N1IRO, William McGrath 43.935242, -72.657349 Start time 22:15 UTC End Fed 130ft Dipole pointed SE (SW max reception) Kenwood TS-2000 receiver GPSDO reference FLDIGI recording as instructed. 24 hour recording of 5 MHz at station N1IRO, Randolph, VT.

opencc-by-4.0Mar 2020View details →

WWV Centennial Festival of Frequency Measurement 5 MHz Collected Data

Manually consolidated 5MHz data from the Festival of Frequency Measurement. Instructions posted here: https://hamsci.org/wwv-centennial-festival-frequency-measurements Callsigns of participants who posted data to Zenodo: VK3ZAZ, WX4US, N7IVV, K7KMQ, AG7PQ, KM4YMI, N1IRO, AC6SL, W1KU, N1NAZ, W6OQI, VE3OAT, NA0B, VE3YX, KE0ARE, XE3I, WB4HIR, W6BM, AA6LK, W6MSU, K0ANS, W3FAY, KA6WKE, WV5L, VE7CNF, N7XZ, K2LYV, VE6IXD, K7JKM, K4BSE, N2MD, VE6GRT, WA5FRF, VA3ROM, KG4ARN, N8OBJ, NU0C, W8UM, AA8K Callsigns of participants whose data was not uploaded to Zenodo: AJ4YA, N9MVO, W8EDU, N7QNM, W9INE, WA7BNM ___________________________________________________________________ Version 2:  Formatting changes: The data has been reformatted to use callsigns, rather than Zenodo IDs, as the primary identifiers for datasets. Data is included as .csv files, an Excel workbook and a .mat file for processing in MATLAB.  Errata: Latitude and longitude were corrected for the following stations: VA3ROM, VK3ZAZ, VE6IXD, VE3OAT, AC6SL, VE7CNF, K4BSE, VE6GRT. Added precision to some others. WA7BNM used a GPSDO, which was not listed in the original dataset; this has been corrected. _____________________________________________________________________ Version 3: due to a formatting error, some coordinates were dropped from the MATLAB and .csv files. This has been corrected.

opencc-by-4.0Dec 2021View details →

WWV USB Recording by KD2LOF, 5 MHz, no GPSDO

Callsign: KD2LOF-1 Radio: Icom 7300 GPSDO: No Antenna: G5RV Junior Coordinates: (40.72412 -73.98919) Elevation: 16.5 meters KD2LOF_R_4999kHz__2021-12-03_23-28-47 KD2LOF_R_4999kHz__2021-12-04_20-28-35 Callsign: KD2LOF-2 Radio: AIRSPY HF+ Discovery GPSDO: No Antenna: MLA30+ Magloop Coordinates: (40.72412 -73.98919) Elevation: 16.5 meters SNASH_2021-12-06_23-04-52/KD2LOF-2_23-04-52_ET_4999 kHz_No GPSDO_0 SNASH_2021-12-08_23-27-25/KD2LOF-2_23-27-25_ET_4999 kHz_No GPSDO_0

01OCT2019 5 MHz WWV

Festival of Frequency Measurement Submission —- event: WWV Centennial UTC date:   235411 30SEP2019 (start) beacon frequency: 5 MHz   station name: W6MSU latitude and longitude and/or maidenhead grid square:  CM98hb city: Stockton state or region: California   Difficulties had:  Latest version of fldigi   Anything you know about the stability of your equipment: Flex 1500 with Symmetricon GPSDO   soapbox: Thank you for the test. 73

WWV Centennial Recording of WWV 5 MHz from Western PA, U.S.A.- NA0B

Festival of Frequency Measurement 1 October 2019 UTC Date 20191001 Beacon Frequency: 5.000.000 Station Name: NA0B Latitud: 40.30.950 N Longitud: 79 55.353 W Grid: FN00am City: O'Hara Township, PA SF=69, A=12, K=1 at the end of measurament Equipment: Flexradio FLEX-6000M with GPS module, 24 hours warm up SW: fldigi 4.1.08 Released publicly under Creative Commons: YES

WWV 5 Mhz reception in Port Huron, Michigan, USA on 1/October/2019

Festival of Frequency Measurement 1 October 2019 Event:  WWV Centennial UTC date:  2019/October/01 Beacon frequency: 5 MHz Michael Naruta - AA8K Location:  42.9960515N 82.4643026W 156.417m, grid EN82sx, near Port Huron, Michigan, USA, Zip code 48060. Start time:  15 minutes before 1/October/2019 UTC End time:  2 hours after 1/October/2019 UTC Antenna:  BiggIR vertical, 10 meters high, with 33 ground radials, each 10 meters long.  Omni-directional. Receiver:  OpenHPSDR Mercury with Alexis bandpass filter.  Software:  PowerSDR OpenHPSDR mRX PS v3.38 (6/9/16), Virtual Audio Cable 4.13.0.5811, Fldigi 4.1.08, MS Windows 10 Home 1809. Frequency reference:  Trimble Thunderbolt GPSDO.  Mercury locked to reference.  Personal computer sound card not locked to reference and may have a higher error.  Devices located in a basement that does not experience wide temperature swings. Measurement procedure:  PowerSDR set for USB with a frequency of 4.999 MHz.  Bandwidth filters set to 950 Hertz and 1050 Hertz, yielding a 100 Hertz bandwidth centered on the 1,000 tone generated by the WWV 5 MHz carrier.  Some difficult initially configuring VAC and Fldigi.  Normally use Spectrum Lab.  Fldigi ran in 'frequency analysis' with data collected into a .csv file.

WWV October 1st UTC 5 MHz Frequency Measurment from Prosser, WA

station name: N7QNM grid square: DN06ce city and state: Prosser, WA 99350 equipment: Elecraft K3 Factory Calibration HyGain AV18HT (Omni Vertical) beacon frequency: 5MHz

zenodo36/100

WWV 5 MHz fom EM74vc

Festival of Frequency Measurement 1 October 2019 Jim Farmer, K4BSE  EM74vc Started recording 20 Sept. 23:29:12, went well past the end of the day because I wasn't home to stop it earlier.  Decided to send all, so didn't cut it. Antenna was a G5RV modified to favor WARC bands.  It gave a bit better performance than my 80M inverted VEE.  Receiver was K3 tuned to 4.999 MHz, USB.  It is stabilized by a GPS disciplined oscillator.  GPSDO had been running for months with no known interruptions.  RX had run for about 5 hours before the measurement period.  RX was set to a bandwidth of about 400 Hz centered on the 1 kHz beat.  The AGC seems to respond to what is in the total IF passband, not what comes through the crystal filter.  The receiver fed a SignalLink USB, feeding an HP laptop.  WWV calibration shortly before the start of the measurement period showed no significant frequency error.  HP laptop was running the current release of fldigi. The large anomalies started around noon local time.  There was no discernable signal in the speaker then. Enjoyed taking part.  Thanks; I had wondered what the WWV and Measurement modes in fldigi did - information is hard to come by.

zenodo36/100

Recording of WWV 5 MHZ from Longmont, CO

Event: WWV Centennial Festival of Frequency Measurements UTC Date: 20190801 Beacon frequency: 5.000 000 Station Name: K0ANS Latitude: 40.16290 N Long: 105.11797 W Grid: DN70kd City: Longmont, CO Difficulties had: My equipment has a observed frequency error of about 1 ppm when warmed up. Equipment: Yaesu FT-817ND with TCXO; warm-up started at about 23:00 SW: fldigi ver 4.1.08 Soapbox: I'm happy to participate. This close to WWV, I expect to receive either ground wave or NVIS.

opencc-by-4.0Sep 2019View details →

zenodo36/100

N8OBJ WWV Data Receprion for 5 MHz

Using home station of RasPi3B, custom receiver, Leo Bodnar GPSDO, my modified FLDigi analysis package

zenodo32/100

10 MHz reference CW measured same as 5 MHz WWV

This is a supplement to file K4BSE 34.124 -84.203 5 MHz.csv submitted last week, just after the frequency measurement period.  I'd wondered about some jumps in frequency error I saw in my earlier submission (see xlxs file attached of the original frequency measurement run), so in this test I measured frequency error in exactly the same way, except that I was measuring a 10 MHz signal from a rubidium stabilized frequency source.  The receiver was still stabilized by a GPSDO.  I see some similar-magnitude frequency jumps here (note change in vertical scale).  Also some frequency drifts is seen between some of the jumps, consistent with frequency drift in the test data submitted previously.  I presume the jumps are due to the frequency calibration jumps in the K3's local oscillator.  As best I can tell, the frequency of the K3 in the locked mode is determined by measurement of the frequency of an external 10 MHz oscillator, which is then used to calculate a correction to the tuned frequency of the radio.  The jumps of a fraction of a Hz are consistent with the stated frequency accuracy of the radio when locked to a good reference (eg., the GPSDO used).

zenodo28/100

w1ku FN42ei WWV 5 MHz 2019-10-01

Dataset for Festival of Frequency Measurement, a component of the celebrations of WWV's 100th anniversary. UTC Date: 20191001 Beacon frequency: 5000000 Station Name: w1ku Grid: FN42ei City: Northborough, MA Equipment: RS-HFIQ (FOX924B TCXO), E-mu 0204 soundcard.  > 24 hours warmup.  HDSDR.  Virtual sound card to fldigi.  System time offset < 1 ms. SW: fldigi ver 3.23.08 Soapbox: A great way to celebrate the centennial of WWV. Released publicly under Creative Commons: yes

zenodo24/100

Recording of WWV 5 MHz Near San Diego, CA , U.S.A

Festival of Frequency Measurement 1 October 2019 <ul> <li>Mark Schoonover KA6WKE</li> <li>Grid: DM12lu/ Santee, CA</li> <li>Start time 0300z</li> <li>Beacon Freq: 5 MHz</li> <li>A description of station hardware configuration, including <ul> <li>W6LVP RX Loop at 7'</li> <li>~37 degrees</li> <li>Icom IC-7600</li> <li>Frequency reference type: Built-in to rig</li> <li>FLDigi</li> </ul> </li> </ul> First time trying a frequency measurement.

zenodo20/100

5 MHz WWV measurements Bakersfield, California

Festival of Frequency Measurement 1 October 2019