Kategorier
Telemetri

Delfi-N3XT telemetry 2021-03-09

RX of 346 packets @DelfiSpace Delfi-N3XT satellite, uploaded to @satnogs Very strong and easy to decode. See software used in this post:

  • RX at aprox 145.868 MHz USB
  • 2 x 6 el VHF Yagi (Vårgårda) circular polarisation
  • AlfaSpid RAS az/el rotor
  • LNA Mini-2 from SHF Elektronik
  • LMR-400 coax
  • Airspy Mini
  • SDR-Console v3 with doppler correction of downlink and satellite tracking, rotor control
  • PstRotator for rotor control interface between SDR-Console and RAS controller
  • VB-Cable: virtual audio cable for piping audio from SDR Console to Soundmodem. Set to 96 kHz and 16 bit.
  • Soundmodem v1.05 at mode BPSK AX.25 2400bd.
  • GetKISS+ v 1.3.9 from DK3WN

And data presented at SatNOGS DB

Kategorier
Telemetri

CAS-4B Telemetry 2021-02-02

Actually my first decode from CAS-4B. I have used the following hardware and software:

  • RX at aprox 145.891 MHz Wide FM BW 13 kHz
  • 2 x 6 el VHF Yagi (Vårgårda) circular polarisation
  • AlfaSpid RAS az/el rotor
  • LNA Mini-2 from SHF Elektronik
  • LMR-400 coax
  • SDRPlay RSP1a
  • SDR-Console v3 with doppler correction of downlink and satellite tracking, rotor control
  • PstRotator for rotor control interface between SDR-Console and RAS controller
  • VB-Cable: virtual audio cable for piping audio from SDR Console to Soundmodem. Set to 96 kHz and 16 bit.
  • HS-Soundmodem v0.21b at mode FSK G3RUH 4800bd.
  • GetKISS+ v 1.3.9 from DK3WN
  • CAS 4 Telemetry Beacon decoder from DK3WN
Kategorier
Satellitnyheter SDR och mjukvara

UVSQSAT tips från SM4JLX Inge

In Swedish only!
Några tips från SM4JLX runt mottagning av UVSQSat:

Just nu styr jag antennerna med en W7 dator och Gpredict tillsammans med rotcld (hamlib-w32-4.0), använder en Arduino Mega med L298N deivkrets. Rotorprogrammet i Arduino är från K3NG. Inte mycket till antenner ännu och ingen preamp.

IC-9700 är kopplad via USB till en W10 dator som även kör Gpredict för frekvens korrigering, där går även SoundModem för att koda ut BPSK, även UVSQsat Decoder – 0.5 för att sända in telemetrin.
Då man är pensionär numera så har jag kunna följa UVSQsat några dar och testat lite andra förslag på satellit än 2021-006AB.
Problemet är att justeringen av doppler frekvensen inte stämmer för mig och då måste man hela tiden justera i SoundModem vilket område datat kommer att hamna.

Nu har jag kommit fram till följande ordning på de olika satelliter som jag lyssnat på och jag skulle då vilja ha satelliter som kommer in tidigare än 6AB. Det gör följande om man ser på passage idag ca. kl. 15. 6AA 4 sek. före 6AB, 6Z 18 sek. före 6AB, 6Y 80 sek. före 6AB. Vid test så fick jag mot 6Y att radion ställde in sig hela passagen på för låg frekvens.
Mot 6Z så ställde radion in sig på för hög frekvens utom vid närmaste avstånd då det verkar stämma bra.

Testat även 6AA och då ställde radion in sig för hög frekvens hela tiden.
Ska kolla 6AB på samma sätt också men jag tror nog att jag får samma värden som 6AA.

Jag kanske är ute och svamlar, men kul tycker jag det är ändå när man få allt att fungera rätt så bra.

Har även en Linux burk med en FunCube dongel som tar telemetri från Fox satelliterna (1 just nu).

73 de SM4JLX / Inge

Kategorier
Satellitnyheter

RadFxSat-2 Signals Detected

Info from ANS-028:
RadFxSat-2 Signals Detected, AMSAT Engineering Continues to Assess
Status

On January 27th, Brad Schumacher, W5SAT, reported copying his CW
signal weakly via the RadFxSat-2 transponder. On the morning of
January 28th, AMSAT Engineering and Operations confirmed these reports and determined that RadFxSat-2 is partially functioning, though
signals are extremely weak. AMSAT thanks W5SAT for his report.

We also appreciate those who joined in determining whether they could
detect their own or other signals in recent passes today.

At this time it is essential and we ask you: Please do not attempt to
transmit through the transponder until further notice. This is very
important to the next steps we are taking now.

The next crucial step in evaluating the condition of RadFxSat-2 is to
determine whether or not the 1200 bps BPSK telemetry beacon is
operating and, if possible, copy telemetry from the beacon. We ask
that everyone with 70cm receive capability listen to the beacon
frequency of 435.750 MHz (+/-) Doppler, upper sideband (USB). Use
FoxTelem with your receiver in order to tune and capture any telemetry
you can. Also make sure FoxTelem is set to “Upload to server” so that
we receive your telemetry data. If you capture a good IQ recording on
SDR, please send a detailed description of your recording to
foxtelem@amsat.us. We may respond with a request for your recording
and details on how to transfer it to the AMSAT Engineering team.
Please understand that keeping the transponder clear is essential to
putting all power and attention to the beacon telemetry.

Two-line elements (TLEs) are available in AMSAT’s nasabare.txt
distribution at https://www.amsat.org/tle/current/nasabare.txt.
Available data suggests that RadFxSat-2 is OBJECT M from the Virgin
Orbit LauncherOne launch, NORAD ID 47320, international designation
21-002M.

We thank the amateur satellite community for their perseverance and
assistance while the AMSAT Engineering and Operations teams work to
understand and resolve the situation with RadFxSat-2.

[ANS thanks the AMSAT Engineering and Operations teams for the above information]

Kategorier
SDR och mjukvara

Satellite Custom Data and Frequency Markers for SDR-Console

Satellite Custom Data XML

In SDR-Console each satellite can have custom frequency data for both up- and downlink. With the support from Christophe from AMSAT-F a lot of satellites now have auto-generated XML files. The most used satellites has after the generation been manually updated by Lars SM0TGU. Read more about the AMSATLIST project for generation of satellites files.

This is how to install the XML files for your SDR Console:

  1. From SDR Console, open your local user folder.

  2. Make a backup of all your local files!
  3. Unzip all the files in the SDR_SAT_Custom_data.zip to your user folder. Please note that all your current XML files will be overwritten.
  4. Restart SDR-Console.
  5. Now all the XML Custom Satellite data files are available the next time you select a satellite.

Note that many satellites needs correction for mode, filter etc. but this can be a good start and you do not need to manually enter all the data.

Download the file:
SDR_SAT_Custom_data.zip
(Updated 2021-01-26)

Satellite Frequency Markers

This is a Spectrum Markers (Frequency Markers) file over ham radio satellites beacon (downlink) for SDR-Console v3 software. It is compiled from a sat list by JE9PEL (thank you!) on date 2019-09-11. (I have not updated the list after this date so many of the new satellites are missing).

Import the csv-file into SDR-Console:

  1. In SDR-Console please go to ”View” -> ”Markers” -> ”Marker Configuration”.
  2. Choose to ”CSV: Import”.
  3. Activate the markers of your interest, all or some. There will be errors, I have not double-checked all the frequencies.

Download the file:
SatelliteFrequencyMarkers_190911.csv

Kategorier
Telemetri

UVSQ-SAT first decode

Today (2021-01-24) I have been following the launch of UVSQ-SAT from the start from SpaceX, to deploy of the satellites to be one of the lucky to be the first to receive and decode telemetry.

Congratulation to all teams behind this satellite!

The decoded data has been sent to MVP Telemetry server:

And also to SatNOGS network:

I have used the following hardware and software:

  • RX at aprox 437.019 MHz USB BW 3.6 kHz
  • 26 el UHF LFA X-Yagi (2* 13 el) from InnovAntennas.
  • AlfaSpid RAS az/el rotor
  • LNA Mini-70 from SHF Elektronik
  • LMR-400 coax
  • SDRPlay RSP1a
  • SDR-Console v3 with doppler correction of downlink and satellite tracking, rotor control
  • PstRotator for rotor control interface between SDR-Console and RAS controller
  • VB-Cable: virtual audio cable for piping audio from SDR Console to Soundmodem. Set to 96 kHz and 16 bit.
  • Soundmodem G3RUH BPSK v 1.02 at mode BPSK G3RUH 1200bd. Be sure that the BPSK signal is centered ”over” the signal in the spectrum.
    For other settings, the picture below. Note the ”Input device” – that is you virtual audio cable.
    KISS Server Port is connected to UVSQsat Decoder.
  • UVSQsat Decoder v0.5. Data is beeing sent to both SatNOGS netword database and MVP Telemetry server.