GR-SATELLITES

NAME

gr_satellites - gr-satellites is a GNU Radio command line decoder for the telemetry of Amateur satellites.

SYNOPSIS

gr_satellites satellite [options]

DESCRIPTION

gr-satellites is a GNU Radio out-of-tree module encompassing a collection of telemetry decoders that supports many different Amateur satellites. It supports most popular protocols, such as AX.25, the GOMspace NanoCom U482C and AX100 modems, an important part of the CCSDS stack, the AO-40 protocol used in the FUNcube satellites, and several ad-hoc protocols used in other satellites.

The gr_satellites command line tool can be used to decode frames from each of the supported satellites by using either real-time RF samples from an SDR or conventional radio, or a recording.

OPTIONS

The satellite parameter can be specified using name, NORAD ID or path to YAML file. The set of available options will change depending on the satellite, so it is mandatory to specify a satellite even to print the full help.

The options shown below are for the satellite AO-73. Other satellites have slightly different options.

General options

-h, --help

show the help message and exit

--version

show program’s version number and exit

--list_satellites

list supported satellites and exit

Input options

--wavfile WAVFILE

WAV/OGG/FLAC input file (using libsndfile)

--rawfile RAWFILE

RAW input file (float32 or complex64)

--rawint16 RAWINT16

RAW input file (int16)

--audio [DEVICE]

Soundcard device input

--udp

Use UDP input

--kiss_in KISS_IN

KISS input file

--samp_rate SAMP_RATE

Sample rate (Hz)

--udp_ip UDP_IP

UDP input listen IP [default=’::’]

--udp_port UDP_PORT

UDP input listen port [default=’7355’]

--iq

Use IQ input

--input_gain INPUT_GAIN

Input gain (can be negative to invert signal) [default=1]

--start_time START_TIME

Recording start timestamp

--throttle

Throttle recording input to 1x speed

Output options

--kiss_out KISS_OUT

KISS output file

--kiss_append

Append to KISS output file

--kiss_server [PORT]

Enable KISS server [default port=8100]

--kiss_server_address KISS_SERVER_ADDRESS

KISS server bind address [default=’127.0.0.1’]

--zmq_pub [ADDRESS]

Enable ZMQ PUB socket [default address=tcp://127.0.0.1:5555]

--hexdump

Hexdump instead of telemetry parse

--dump_path DUMP_PATH

Path to dump internal signals

Demodulation options

--f_offset F_OFFSET

Frequency offset (Hz) [default=1500 or 12000]

--rrc_alpha RRC_ALPHA

RRC roll-off (Hz) [default=0.35]

--disable_fll

Disable FLL

--fll_bw FLL_BW

FLL bandwidth (Hz) [default=25]

--clk_bw CLK_BW

Clock recovery bandwidth (relative to baudrate) [default=0.06]

--clk_limit CLK_LIMIT

Clock recovery limit (relative to baudrate) [default=0.02]

--costas_bw COSTAS_BW

Costas loop bandwidth (Hz) [default=50]

--manchester_history MANCHESTER_HISTORY

Manchester recovery history (symbols) [default=32]

Deframing options

--syncword_threshold SYNCWORD_THRESHOLD

Syncword bit errors [default=8]

--verbose_rs

Verbose RS decoder

Data sink

--telemetry_output TELEMETRY_OUTPUT

Telemetry output file [default=stdout]

SEE ALSO

jy1sat_ssdv(1), smog_p_spectrum(1)