ISEE1 Resonance Sounder Quicklook (PNG)

https://doi.org/10.24400/802406/x2qc-agqn

2022-02-18 11:19:47Z

The data files from this dataset contain reconstructed calibrated wave spectra and the ancillary parameters necessary for their interpretation.
Each record has a fixed content of 128 frequency steps and key ancillary parameters.
Each frequency step has 7 samples. Depending on the mode, the full frequency range can extend from 0.3 to 51 kHz or 0-353 kHz.
The actual frequency range can be reduced with respect to these values. In that case the missing steps are set to 0.
Each valid frequency step can have less than 7 samples recorded with increasing time. The missing ones are set to 0.
In some specific modes where there are more than 7 samples per step, the first one is the strongest value observed during the step analysis. The last one is the lowest value, the 5 other values are the averages of remaining samples as time increases.
Record content is identical for both resonance spectra (active mode emitter on) and natural plasma waves (passive mode, emitter off).

Note: In the 3200 Hz mode, for technical reason induced by the instrument design,
frequency used from step 0 to 15 are the same than those used from steps 31 to 16 (namely from 3200 to 48000 Hz by 3200 Hz step).
This introduces an 'artefact' (a pseudo mirror mode) when you try to plot the data (especially spectrograms).
Thus, we decided to avoid plotting data issued from steps 0 to 15 for the 3200 Hz mode in the spectrograms distribued by CDPP.
However, in CDPP/CDF files, data are preserved as originally acquired by the instrument.

Warning: In the following list, each file contains a short time sequence with a few non chronological spectra due to bad reconstruction from the raw telemetry.

isee1_snd_h2_19780902_000137_235952_v01.png: REC 6 Last time found 00H12m33.65s Time read 00H03M45.90s
isee1_snd_h2_19790419_000118_235918_v01.png: REC 245 Last time found 01H39m18.41s Time read 01H17M57.91s
isee1_snd_h2_19790523_000000_234613_v01.png: REC 2445 Last time found 20H22m 5.48s Time read 20H10M37.80s
isee1_snd_h2_19790709_000002_235920_v01.png: REC 1635 Last time found 18H28m 3.13s Time read 18H23M46.51s
isee1_snd_h2_19790803_000117_235851_v01.png: REC 1470 Last time found 15H02m59.70s Time read 14H50M27.64s
isee1_snd_h2_19790809_000006_235956_v01.png: REC 764 Last time found 03H25m20.25s Time read 03H25M18.10s
isee1_snd_h2_19800805_000133_235900_v01.png: REC 873 Last time found 20H10m35.06s Time read 20H09M31.01s
isee1_snd_h2_19800827_000005_235852_v01.png: REC 1271 Last time found 08H10m47.28s Time read 08H09M43.22s
isee1_snd_h2_19801201_000127_235902_v01.png: REC 1050 Last time found 12H51m14.77s Time read 12H02M10.71s
isee1_snd_h2_19810525_000011_235930_v01.png: REC 718 Last time found 07H30m 7.22s Time read 07H06M39.16s
isee1_snd_h2_19830327_015609_191239_v01.png: REC 8612 Last time found 12H25m27.34s Time read 12H25M11.33s
isee1_snd_h2_19830421_004401_190045_v01.png: REC 4498 Last time found 12H34m52.95s Time read 12H34M36.94s
isee1_snd_h2_19830702_001424_235951_v01.png: REC 1728 Last time found 04H16m41.27s Time read 04H16M25.26s
isee1_snd_h2_19830827_000147_235910_v01.png: REC 9447 Last time found 21H55m18.83s Time read 21H31M50.76s
isee1_snd_h2_19840214_002344_235952_v01.png: REC 7896 Last time found 18H53m20.91s Time read 18H53M 4.90s
isee1_snd_h2_19840215_000008_235958_v01.png: REC 538 Last time found 04H32m32.27s Time read 04H31M28.21s
isee1_snd_h2_19840426_004706_235806_v01.png: REC 1188 Last time found 04H36m35.51s Time read 04H36M19.50s

The ISEE1 data provided here are publicly available. We suggest contacting P. Canu (LPP) when using these data and for any further question. In publications, we recommend to add the following sentence in the acknowledgments: The authors acknowledge CNES (Centre National d'Etudes Spatiales) and CRPE (now LPP) for support for operations of the instrument and production of these data and CDPP for their archiving and provision.

Online

PNG

ISEE1 SND 24h electric field dynamic spectrogram (0.3 to 51 kHz)

ISEE1 SND 24h electric field dynamic spectrogram in 0.3 to 51 kHz frequency range, with frequency in kHz on the vertical axis and time in UT on the horizontal axis

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ISEE1 SND 24h electric field dynamic spectrogram (0 to 353 kHz)

ISEE1 SND 24h electric field dynamic spectrogram in 0 to 353 kHz frequency range, with frequency in kHz on the vertical axis and time in UT on the horizontal axis

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