Comments (5)
Aang23
commented on June 4, 2024
Indeed. That should not be happening. Do you have the satdump.log file on hand? I would want to see what the resampler what set to.
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shuyuan-liu
commented on June 4, 2024
Using 6M,
[08/12/21 - 10:41:19] (D) Starting livedemod...
[08/12/21 - 10:41:19] (I) meteor_m2_lrpt
[08/12/21 - 10:41:19] (I) Starting live pipeline METEOR M2 LRPT
[08/12/21 - 10:41:19] (I) Module qpsk_demod
[08/12/21 - 10:41:19] (D) Parameters :
[08/12/21 - 10:41:19] (D) - agc_rate : 0.1
[08/12/21 - 10:41:19] (D) - baseband_format : f32
[08/12/21 - 10:41:19] (D) - buffer_size : 8192
[08/12/21 - 10:41:19] (D) - costas_bw : 0.004
[08/12/21 - 10:41:19] (D) - dc_block : 0
[08/12/21 - 10:41:19] (D) - rrc_alpha : 0.6
[08/12/21 - 10:41:19] (D) - rrc_taps : 361
[08/12/21 - 10:41:19] (D) - samplerate : 6000000
[08/12/21 - 10:41:19] (D) - symbolrate : 72000
[08/12/21 - 10:41:19] (I) Module meteor_lrpt_decoder
[08/12/21 - 10:41:19] (D) Parameters :
[08/12/21 - 10:41:19] (D) - baseband_format : f32
[08/12/21 - 10:41:19] (D) - dc_block : 0
[08/12/21 - 10:41:19] (D) - diff_decode : 0
[08/12/21 - 10:41:19] (D) - samplerate : 6000000
[08/12/21 - 10:41:19] (T) Volk has the spiral kernel, using it!
[08/12/21 - 10:41:19] (D) Starting SDR...
[08/12/21 - 10:41:19] (D) Device parameters airspy:
[08/12/21 - 10:41:19] (D) - bias : 1
[08/12/21 - 10:41:19] (D) - gain : 10
[08/12/21 - 10:41:19] (I) Opened Airspy device!
[08/12/21 - 10:41:19] (I) Samplerate 6000000.000000
[08/12/21 - 10:41:19] (I) Frequency 137100000.000000
[08/12/21 - 10:41:19] (D) Input SPS : 83.333336
[08/12/21 - 10:41:19] (D) Resample : 1
[08/12/21 - 10:41:19] (D) Samplerate : 210000.000000
[08/12/21 - 10:41:19] (D) Dec factor : 28.571428
[08/12/21 - 10:41:19] (D) Final SPS : 2.916667
[08/12/21 - 10:41:19] (I) Start processing...
[08/12/21 - 10:41:19] (I) Using input baseband
[08/12/21 - 10:41:19] (I) Demodulating to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.soft
[08/12/21 - 10:41:19] (I) Buffer size : 237568
[08/12/21 - 10:41:19] (I) Start processing...
[08/12/21 - 10:41:19] (I) Using input symbols
[08/12/21 - 10:41:19] (I) Decoding to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.cadu
...
Using 3M,
[08/12/21 - 10:39:56] (D) Starting livedemod...
[08/12/21 - 10:39:56] (I) meteor_m2_lrpt
[08/12/21 - 10:39:56] (I) Starting live pipeline METEOR M2 LRPT
[08/12/21 - 10:39:56] (I) Module qpsk_demod
[08/12/21 - 10:39:56] (D) Parameters :
[08/12/21 - 10:39:56] (D) - agc_rate : 0.1
[08/12/21 - 10:39:56] (D) - baseband_format : f32
[08/12/21 - 10:39:56] (D) - buffer_size : 8192
[08/12/21 - 10:39:56] (D) - costas_bw : 0.004
[08/12/21 - 10:39:56] (D) - dc_block : 0
[08/12/21 - 10:39:56] (D) - rrc_alpha : 0.6
[08/12/21 - 10:39:56] (D) - rrc_taps : 361
[08/12/21 - 10:39:56] (D) - samplerate : 3000000
[08/12/21 - 10:39:56] (D) - symbolrate : 72000
[08/12/21 - 10:39:56] (I) Module meteor_lrpt_decoder
[08/12/21 - 10:39:56] (D) Parameters :
[08/12/21 - 10:39:56] (D) - baseband_format : f32
[08/12/21 - 10:39:56] (D) - dc_block : 0
[08/12/21 - 10:39:56] (D) - diff_decode : 0
[08/12/21 - 10:39:56] (D) - samplerate : 3000000
[08/12/21 - 10:39:56] (T) Volk has the spiral kernel, using it!
[08/12/21 - 10:39:56] (D) Starting SDR...
[08/12/21 - 10:39:56] (D) Device parameters airspy:
[08/12/21 - 10:39:56] (D) - bias : 0
[08/12/21 - 10:39:56] (D) - gain : 10
[08/12/21 - 10:39:56] (I) Opened Airspy device!
[08/12/21 - 10:39:56] (I) Samplerate 3000000.000000
[08/12/21 - 10:39:56] (I) Frequency 137100000.000000
[08/12/21 - 10:39:56] (D) Input SPS : 41.666668
[08/12/21 - 10:39:56] (D) Resample : 1
[08/12/21 - 10:39:56] (D) Samplerate : 210000.000000
[08/12/21 - 10:39:56] (D) Dec factor : 14.285714
[08/12/21 - 10:39:56] (D) Final SPS : 2.916667
[08/12/21 - 10:39:56] (I) Start processing...
[08/12/21 - 10:39:56] (I) Start processing...
[08/12/21 - 10:39:56] (I) Using input baseband
[08/12/21 - 10:39:56] (I) Demodulating to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.soft
[08/12/21 - 10:39:56] (I) Buffer size : 114688
[08/12/21 - 10:39:56] (I) Using input symbols
[08/12/21 - 10:39:56] (I) Decoding to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.cadu
...
And using 1M,
[08/12/21 - 10:40:16] (D) Starting livedemod...
[08/12/21 - 10:40:16] (I) meteor_m2_lrpt
[08/12/21 - 10:40:16] (I) Starting live pipeline METEOR M2 LRPT
[08/12/21 - 10:40:16] (I) Module qpsk_demod
[08/12/21 - 10:40:16] (D) Parameters :
[08/12/21 - 10:40:16] (D) - agc_rate : 0.1
[08/12/21 - 10:40:16] (D) - baseband_format : f32
[08/12/21 - 10:40:16] (D) - buffer_size : 8192
[08/12/21 - 10:40:16] (D) - costas_bw : 0.004
[08/12/21 - 10:40:16] (D) - dc_block : 0
[08/12/21 - 10:40:16] (D) - rrc_alpha : 0.6
[08/12/21 - 10:40:16] (D) - rrc_taps : 361
[08/12/21 - 10:40:16] (D) - samplerate : 1000000
[08/12/21 - 10:40:16] (D) - symbolrate : 72000
[08/12/21 - 10:40:16] (I) Module meteor_lrpt_decoder
[08/12/21 - 10:40:16] (D) Parameters :
[08/12/21 - 10:40:16] (D) - baseband_format : f32
[08/12/21 - 10:40:16] (D) - dc_block : 0
[08/12/21 - 10:40:16] (D) - diff_decode : 0
[08/12/21 - 10:40:16] (D) - samplerate : 1000000
[08/12/21 - 10:40:16] (T) Volk has the spiral kernel, using it!
[08/12/21 - 10:40:16] (D) Starting SDR...
[08/12/21 - 10:40:16] (D) Device parameters airspy:
[08/12/21 - 10:40:16] (D) - bias : 0
[08/12/21 - 10:40:16] (D) - gain : 10
[08/12/21 - 10:40:16] (I) Opened Airspy device!
[08/12/21 - 10:40:16] (I) Samplerate 1000000.000000
[08/12/21 - 10:40:16] (I) Frequency 137100000.000000
[08/12/21 - 10:40:16] (D) Input SPS : 13.888889
[08/12/21 - 10:40:16] (D) Resample : 1
[08/12/21 - 10:40:16] (D) Samplerate : 210000.000000
[08/12/21 - 10:40:16] (D) Dec factor : 4.761905
[08/12/21 - 10:40:16] (D) Final SPS : 2.916667
[08/12/21 - 10:40:16] (I) Start processing...
[08/12/21 - 10:40:16] (I) Start processing...
[08/12/21 - 10:40:16] (I) Using input baseband
[08/12/21 - 10:40:16] (I) Demodulating to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.soft
[08/12/21 - 10:40:16] (I) Buffer size : 40960
[08/12/21 - 10:40:16] (I) Using input symbols
[08/12/21 - 10:40:16] (I) Decoding to /mnt/Data/Pictures/Satellite/meteor_m2_lrpt.cadu
...
Only 6M doesn't work.
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Aang23
commented on June 4, 2024
Just to be sure, are you using the latest? I have fixed a bug quite similar to this one recently.
Thanks!
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shuyuan-liu
commented on June 4, 2024
The tests above were made with dae96ec. I've now updated to 2cca817 and the problem persists. No difference in terminal output between the two versions.
I don't know if it's related or even normal, but at higher sample rates the constellation diagrams seem to be moving more slowly. Since this is live decoding, shouldn't symbols be coming at the same rate no matter the sample rate?
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Aang23
commented on June 4, 2024
The tests above were made with dae96ec. I've now updated to 2cca817 and the problem persists. No difference in terminal output between the two versions.
I don't know if it's related or even normal, but at higher sample rates the constellation diagrams seem to be moving more slowly. Since this is live decoding, shouldn't symbols be coming at the same rate no matter the sample rate?
I just fixed it in fac23f9.
Even though it is the same samplerate, resampling is done on large buffers and yield less updates per second on very high ratios. It's something that could be fixed but at the cost of some performance... Don't think it's that necessary.
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Related Issues (20)
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- Samplerate is Zero in CLI autotrack setup HOT 2
- Forum? Getting help? HOT 6
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- Question: How to get cadu frames out via TCP in real-time? HOT 1
- satdump-ui daily build displaying 1.2.0-67e652c3 version HOT 2
- Meteor-m2-4 Map overlay HOT 5
- SatDump 1.1.4 and nightly 1.4 crash HOT 5
- Command line arguments for file input in satdump live CLI? HOT 4
- Regarding the software crash phenomenon during METEOR M2-4 reception HOT 6
- Meteor M2-4 HRPT Crash HOT 1
- Satdump logs HOT 1
- When Using CLI to add stereo and tpers projections, width and height are not found HOT 3
- Satdump stopped running overnight saying it received a command HOT 3
- Failed to start satdump after Win 11 install HOT 2
- NOAA APT location calculation error for nightly build v1.2.0-127cab9 HOT 2
- SNR Logs
- S-pen doesn't work on Samsung tablet HOT 3
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