Still no data - Sample Rate Error

SatNOGS Software
1

All my observations have failed. I find this in the log “ERROR - No waterfall data file found”
I have run satnogs_afsk1200_ax25.py and can make a large audio and waterfall file.
I can run rtl_test and do not see errors.
However, when I schedule an observation, part way through the observation I get an error saying the sample rate is wrong (see below). The sample rates that are mentioned in the error are nothing like what I get with SoapySDRUtil probe.
A little before the error message, I get this message “Found Rafael Micro R820T tuner” but up until that everything looks fine.

Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102481
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Satellite data: {'tle0': '0 NOAA 19', 'tle1': '1 33591U 09005A   22091.77916833  .000001
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Calculated data: {'alt': 0.26655933260917664, 'az': 3.5331718921661377, 'rng': 2103470.2
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102481
Apr 02 01:37:39 raspberrypi satnogs-client[349]: Found Rafael Micro R820T tuner
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Satellite data: {'tle0': '0 NOAA 19', 'tle1': '1 33591U 09005A   22091.77916833  .000001
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Calculated data: {'alt': 0.26672279834747314, 'az': 3.5333762168884277, 'rng': 2102910.5
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:39 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102480
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Satellite data: {'tle0': '0 NOAA 19', 'tle1': '1 33591U 09005A   22091.77916833  .000001
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Calculated data: {'alt': 0.26688677072525024, 'az': 3.533581495285034, 'rng': 2102349.5,
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102480
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Satellite data: {'tle0': '0 NOAA 19', 'tle1': '1 33591U 09005A   22091.77916833  .000001
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Calculated data: {'alt': 0.267050564289093, 'az': 3.5337865352630615, 'rng': 2101789.0, 
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102480
Apr 02 01:37:40 raspberrypi satnogs-client[349]: Traceback (most recent call last):
Apr 02 01:37:40 raspberrypi satnogs-client[349]:   File "/usr/bin/satnogs_noaa_apt_decoder.py", line 484, in <module>
Apr 02 01:37:40 raspberrypi satnogs-client[349]:     main()
Apr 02 01:37:40 raspberrypi satnogs-client[349]:   File "/usr/bin/satnogs_noaa_apt_decoder.py", line 467, in main
Apr 02 01:37:40 raspberrypi satnogs-client[349]:     tb = top_block_cls(antenna=options.antenna, bb_freq=options.bb_freq, bw=options.bw, dc_removal=options.dc_removal, decoded_da
Apr 02 01:37:40 raspberrypi satnogs-client[349]:   File "/usr/bin/satnogs_noaa_apt_decoder.py", line 91, in __init__
Apr 02 01:37:40 raspberrypi satnogs-client[349]:     tune_args, settings, samp_rate_rx, "fc32")
Apr 02 01:37:40 raspberrypi satnogs-client[349]:   File "/usr/lib/python3/dist-packages/soapy/soapy_swig.py", line 166, in make
Apr 02 01:37:40 raspberrypi satnogs-client[349]:     return _soapy_swig.source_make(nchan, device, dev_args, stream_args, tune_args, other_settings, sampling_rate, type)
Apr 02 01:37:40 raspberrypi satnogs-client[349]: RuntimeError: soapy::source: Unsupported sample rate (2880000.000000).  Rate must be in the range [8000.000000, 8000.000000] [160
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Satellite data: {'tle0': '0 NOAA 19', 'tle1': '1 33591U 09005A   22091.77916833  .000001
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Calculated data: {'alt': 0.26721471548080444, 'az': 3.533992052078247, 'rng': 2101227.75
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Initial frequency: 137100000
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.worker - DEBUG - Rigctld msg: 137102479
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogsclient.observer.orbital - DEBUG - Observer data: {'lon': -88.0, 'lat': 42.25, 'elev': 200}
Apr 02 01:37:40 raspberrypi satnogs-client[349]: satnogs
2

The error and the solution is pretty obvious in this line :slight_smile:

You need to use a different value for the sample rate, something between 8000 and 8000, which means 8000.

3

Unfortunately the line you pointed out got truncated. Here is the entire remainder of the line. It looks like it is looking for a serial connection e.g. 9600 baud. I have also included the sample rates given by SoapyUtil.
Rate must be in the range [8000.000000, 8000.000000] [16000.000000, 16000.000000] [22050.000000, 22050.000000] [32000.000000, 32000.000000] [44100.000000, 44100.000000] [48000.000000, 48000.000000] [96000.000000, 96000.000000]
From SoapyUtil
Sample rates: 0.25, 1.024, 1.536, 1.792, 1.92, 2.048, 2.16, 2.56, 2.88, 3.2 MSps

Support info
{
“versions”: {
“satnogs-client”: “1.6”,
“satnogs-client-ansible”: “202109022142”,
“satnogs-flowgraphs”: “1.4-1”,
“gr-satnogs”: “2.3.1.1-1”,
“gr-soapy”: “2.1.3.1-1”,
“gnuradio”: “3.8.2.0-14satnogs2”,
“satnogs-config”: “0.12”
},
“state”: {
“is-applied”: true,
“pending-tags”: null
},
“system”: {
“date”: “2022-04-02T18:02:54.885806+00:00”,
“distribution”: {
“DESCRIPTION”: “Raspbian GNU/Linux 10 (buster)”,
“RELEASE”: “10”,
“CODENAME”: “buster”,
“ID”: “Raspbian”
},
“pending-updates”: true,
“platform”: {
“system”: “Linux”,
“node”: “raspberrypi”,
“release”: “5.10.103-v7l+”,
“version”: “#1529 SMP Tue Mar 8 12:24:00 GMT 2022”,
“machine”: “armv7l”,
“processor”: “”
},
“memory”: {
“total”: 4025208832,
“available”: 3766136832,
“percent”: 6.4,
“used”: 119193600,
“free”: 3533029376,
“active”: 143507456,
“inactive”: 290725888,
“buffers”: 23965696,
“cached”: 349020160,
“shared”: 8830976,
“slab”: 32706560
},
“disk”: {
“total”: 31172087808,
“used”: 3425792000,
“free”: 26425327616,
“percent”: 11.5
}
},
“configuration”: {
“satnogs_antenna”: “RX”,
“satnogs_api_token”: “[redacted]”,
“satnogs_complete_output_path”: “/tmp/.satnogs/data/complete”,
“satnogs_log_level”: “DEBUG”,
“satnogs_remove_raw_files”: false,
“satnogs_rx_samp_rate”: “1.92e6”,
“satnogs_soapy_rx_device”: “rtlsdr”,
“satnogs_station_elev”: “200”,
“satnogs_station_id”: “2579”,
“satnogs_station_lat”: “42.25”,
“satnogs_station_lon”: “-88”,
“sentry_enabled”: true
}
}
------------[ copy end ]-------------

1 Like
4

Choosing this one should make it work and I think it is a good value as higher values may be not processed by RPi CPU. However if this works fine you can experiment to find out.

5

Still no luck with the slowest supported speed of the RTLSDR
soapy::source: Unsupported sample rate (250000.000000). Rate must be in the range [8000.000000, 8000.000000] …
So I tried 96e3 and go no errors, but there was no change in the result – No Waterfall Data.
There was this message during the observation
Assertion ‘close_nointr(fd) != -EBADF’ failed at …/src/basic/fd-util.c:67, function safe_close(). Aborting.
However, it looked like the observation continued to the end.

6

I gave up and tried to reload the artifact file. No luck. I get firmware not found, but on the same SD I can load the standard pi 32 bit os and it works just fine. I will revisit this project in a few months. Thanks for your help.

7

I got everything to work when I burned from a Linux machine and closely followed the instructions.

4 Likes