2017 Eclipse HF Frequency Measurement Experiment
- How does the 2017 Total Solar Eclipse affect HF propagation paths?
- Measure HF path Doppler shifts caused by the motion of the eclipse shadow across the ionosphere.
- Control Day: August 20, 2017, 1400 – 2200 UTC
- Eclipse Day: August 21, 2017, 1400 – 2200 UTC
|WWV in Fort Collins, CO
|CHU in Ottawa, Ontario, Canada
- To make narrow-band, precision frequency observations of the beacons, we recommend following the instructions on the Spectrum Lab Solar Eclipse Instructions Page. Please note that we understand that there are multiple ways of making accurate Doppler shift measurements. Please feel free to use an alternative procedure as long as it is technically sound and can adequately describe the procedure you used in your final data submission so that others will be able to properly interpret your measurements.
- Receive stations south of the eclipse path should monitor CHU, while receive stations north of the eclipse path should monitor WWV. This will ensure that the signal path crosses the eclipse. You can find your location relative to the eclipse path with Xavier Jubier's Eclipse Map.
- Measure as many frequencies as you are able continuously and simultaneously.
- Do not frequency-hop or otherwise alternate between frequencies.
- The greatest effect is expected at the lowest frequencies, therefore prioritize measuring the lowest frequencies.
Uploading to Zenodo
For each observation period, please submit the following items:
- Raw Audio Recording(s)
- Processed Spectrum Lab Text File(s)
Use the <Callsign>_<freq>kHz_<YYYYMMDD>_<HHMM>UT.<ext> filename convention for uploaded where HHMM is the UT start time of that particular file. Examples:
- K2MFF_2500kHz_20170821_1400UT.wav (for an audio recording made at K2MFF on 2500 kHz on 21 Aug 2017 starting at 1400 UT)
- K2MFF_2500kHz_20170821_1400UT.txt (for a Spectrum Lab data file made at K2MFF on 2500 kHz on 21 Aug 2017 starting at 1400 UT)
In the data description box, please include:
- Your Name and Callsign
- Latitude and Longitude of the Recording
- Start time of the WAV file
- A description of station hardware configuration, including
- Antenna type
- Antenna pointing direction (if applicable)
- Receiver type
- Frequency reference type
- Frequency measurement technique
- Any other information you believe would be necessary for proper scientific interpretation of your measurements
In the Notes box, you may include your personal comments regarding your observations.
Please license your data as:
- Open Source
- Creative Commons Attribution 4.0
Page Contributors: WA9VNJ, N8UR, W8RKO, W2NAF, KD2JAO, KM4EGE
Last edit: 10 August 2017