Annular Solar Eclipse 2023: recordings of the entire medium-wave AM broadcast band from Phoenix, AZ, USA, Part 1

recorded by Burke Baumann, KF7NP

Grid square of location recorded:   DM33wp

Maximum obscuration of the sun was 79% at 1632UT on 14 October 2023.

These data files are recordings of the entire medium wave broadcast band (535-1705kHz) made during the annular solar eclipse of 14 October 2024 from 1501UT to 1755UT at Phoenix, AZ, USA.  They are part of a set of such recordings made from 1304 to 2200UT on 14 October and from 1300 to 2200UT on 15 October, 2023.

Data Quality:   Some broadband local electrical noise was present, plus some spurious carriers, but did not affect overall quality.

Data files are .wav format, but the archived files are .zip, with four or five .wav files packaged together in each .zip file, using the prefix "KF7NP-wideband_160_2080kHz".  As the total files recorded during the solar eclipse exceeded the Zenodo 50GB limit, the remainder of the dataset is found in "Annular Solar Eclipse 2023: recordings of the entire medium-wave AM broadcast band from Phoenix, AZ, USA, Part 2”

The recordings not included here or in Part 2 are available to provide reference data for the eclipse recordings.  Please contact HamSCI at [e-mail] if you require this data. 

Antenna:  Hustler 20m mobile vertical with an inline choke balun in the feed line   

Receiver:  Receiver used:    ICOM IC-7610 SDR transceiver (16-bit data), 0dB front end gain / attenuation.  (Baumann: I also believe the IC-7610 has a low pass filter with a cutoff at 1.6 MHz so signals above this may be attenuated.)  Center frequency was 1100kHz, recording a 1920kHz wide passband using HDSDR software.   The receiver was locked to a 10 MHz signal from a homebrew GPSDO reference, which was always accurate to better than  0.1 ppb.  Computer time accuracy was determined by Dimension 4 NTP.