Altitude 240 km over Stockholm, still going strong!
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Nayif-1 EO-88 2023-07-16 1900UTC
Author: SM0TGU
Webmaster and member of the AMSAT-SM steering group.
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Nayif-1 EO-88 2023-07-14 0910UTC
Altitude 253 km over Stockholm
AMSAT-NA has a free “Getting Started” compendium available for download. AMSAT-NA tells us:
Here is a freely downloadable compendium of “getting started” articles written by Keith Baker, KB1SF/VA3KSF. These articles originally appeared in The AMSAT Journal from 2019 to 2021.
Unfortunately, because both satellites and URLs change over time, the currentness of information such as this can quickly be overcome by events. However, the tools and techniques outlined in Keith’s beginner series are still very much applicable to operating on current and future AMSAT satellites.
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LEDSAT telemetry 2023-07-02
@LEDSAT_Team telemetry over Stockholm 2023-07-02. Good copy, nice S/N, but strong local interference. Software and hardware used:
- RX at aprox 435.188 MHz USB
- 2 x 13 el LFA X-Yagi (InnovAntenna) switched between HOR and VER polarisation
- AlfaSpid RAS az/el rotor
- LNA Mini-70 from SHF Elektronik
- LMR-400 coax
- Airspy Mini SDR
- 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.
- Greencube Soundmodem v0.08b at mode 1200bd
- GetKISS+ v 1.4.2 from DK3WN for sending telemetry to SatNOGS dB
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CubeBel-2 received 2023-07-02
CubeBel-2 telemetry @EU1SAT over Stockholm ar 2023-07-02. Software and hardware used:
- RX at aprox 436.991 MHz Wide FM BW 12 kHz
- 2 x 13 el LFA X-Yagi (InnovAntenna) switched between HOR and VER polarisation
- AlfaSpid RAS az/el rotor
- LNA Mini-70 from SHF Elektronik
- LMR-400 coax
- Airspy Mini SDR
- 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 v0.27 at mode FSK G3RUH 9600bd.
- GetKISS+ v 1.4.2 from DK3WN for sending telemetry to SatNOGS dB
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URESAT-1 Deployed
Information from ANS-176 and AMSAT-EA
The URESAT-1 satellite, also known as HADES-B according to its ITU designation, successfully launched into space as part of the SpaceX Transporter-8 mission from Vandenberg AFB on Monday, June 12. The satellite is a joint effort between AMSAT-EA, URE (the Spanish equivalent of ARRL), private companies, and universities.
The URESAT-1 satellite, contained within the D-Orbit ION Orbital Transfer Vehicle (OTV), was not deployed directly from the Falcon-9 rocket. Instead, approximately one hour and twenty minutes after launch, the Falcon-9 released the OTV. URESAT-1 was deployed from the OTV at approximately 12:10 UTC on June 22, 2023. As of this writing, signals have not yet been received from the satellite.
One of the primary objectives of URESAT-1 is to serve as an FM voice and FSK data repeater. Equipped with a Slow Scan Television (SSTV) camera, the satellite will transmit live images as well as stored images at regular intervals. It also features a chess game, enabling players on Earth to engage in a game against the satellite. Periodically, the satellite will transmit updates on the state of the game, including the chess board, the last movement made, and whether the next move belongs to the players or the satellite.
The specified frequencies for communication with URESAT-1 are as follows: for uplink transmissions, 145.975 MHz or 145.925 MHz (auxiliary frequency) using FM voice without subtone, FSK 50 bps, AFSK, AX.25, APRS 1200/2400 bps. For downlink transmissions, the frequency is set at 436.888 MHz, and modes include FM voice, CW, FSK 50 bps telemetry, SSTV Robot 36, and a voice beacon with the callsign AO4URE.
To provide further information regarding URESAT-1’s transmissions, the AMSAT-EA organization has made available a comprehensive document that can be accessed at the following link: https://www.amsat-ea.org/app/download/13366685/AMSAT+EA+-+URESAT-1+Transmissions+description.pdf
For those interested in decoding the telemetry, a Linux x86/ARM decoder is available for download at the following link: https://www.amsat-ea.org/app/download/13395017/URESAT-1_telemetry_decoder_Linux_X86_ARM_v1.0.zip
A sample file containing the audio of a telemetry file can be found here: https://www.amsat-ea.org/app/download/13398144/URESAT-1_sample_FSK_telemetry-chessboard_packet.wav
If URESAT-1 operates as intended, the project team plans to release a Linux program that will allow players to send their chess moves to the satellite, further enhancing the interactive experience.
[ANS thanks Félix Páez, EA4GQS, AMSAT-EA President for the above information]