This repository contains HamSCI December 2021 Eclipse Festival of Frequency Measurement result from my home station JJ1BDX in Setagaya City, Tokyo, Japan at Grid Locator PM95tp.
- Read measurement-code/README.md first
- Then follow aggregated-values/README.md
- See Zenodo archive (doi: 10.5281/zenodo.5774479) for the raw audio data
1-DEC-2021 0000UTC - 10-DEC-2021 2359UTC
See also grape-1-testing-log.md for the configuration details.
- Antenna: 1m-length 30m-band whip at 8m height above the ground
- Receiver: HamSCI Grape 1 with Leo Bodnar mini GPSDO
- Sound interface: Sabrent audio interface
- Recorded on: running on Ubuntu 20.04.3 x86_64 (Intel NUC DN2820FYKH with Intel Celeron N2820)
- Recorded 8kHz-rate WAV files at 9999kHz DSB (both USB and LSB merged)
- See jj1bdx/dcrx-10MHz-design for the further reference.
- Estimated frequency of received AM carrier for the standard frequency stations (BPM, WWVH, WWV were observable)
- Estimated relative amplitude of the carrier (after filtered for the frequency measurement)
- Sound card sampling rate offset (by recording starting and ending time of 86400-second (1-day) reception activity)
- add-wavefile-tags/: templates and scripts for adding WAV file tags using taglib
- aggregated-values/: merged data of from the measured-values/ directory files, and the calculation/estimation/visualization R code
- fldigi-csvs/: fldigi-and-PSWS-compatible CSV output of the estimated data by date
- graphs/: summary graphs by date
- measured-values/: measured data by analyzing the recorded WAV files
- measurement-code/: the WAV file analysis code in csdr and C
- Kristina Collins, KD8OXT
- HamSCI people and community
- Pepabo R&D Institute, GMO Pepabo, Inc., for their financial and moral support
CC0
