Blog (Page 21)

AMSAT-EA GENESIS satellites may launch September

AMSAT-EA GENESIS Satellites

Spain’s national amateur radio society, the URE, report two AMSAT-EA GENESIS satellites are expected to be launched on September 2, 2021.

A translation of the URE post reads:

The GENESIS-L and GENESIS-N satellites, designed and built by AMSAT-EA in collaboration with students from the European University and ICAI, will be launched, in a first attempt, on September 2, once the American company Firefly has carried out the static test of the Alpha launcher, this being the last step before its launch. The vehicle is ready for takeoff on its platform from Vanderberg Air Force Base in California and carries, for this inaugural flight, many other satellites from various organizations and universities.

The GENESIS are digital repeating satellites of ASK and CW and also carry Applied Ion Systems’ AIS-gPPT3-1C experimental ion thrusters.

The working frequencies of the satellites are as follows:

GENESIS-L
145.875 MHz uplink, Modes: CW, ASK 50 bps
436.875 MHz downlink CW, ASK 50 bps, am2sat callsign

GENESIS-N
145.888 MHz uplink, Modes: CW and ASK 50 bps
436.888 MHz downlink CW ASK 50 bps, am3sat callsign
The description of the telemetry and the mode of operation of its repeaters can be found in the following links:

Link to telemetry transmissions description (in English)
https://www.amsat-ea.org/app/download/12293076/AMSAT+EA+-+GENESIS+transmissions+description.pdf

Source URE https://www.ure.es/satelites-genesis-de-amsat-ea-2/

Get The Details…

m5aka

AMSAT-UK

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Antarctica: DP0GVN QO-100 antenna destroyed, rebuild planned for 2022

AWI Neumayer Station III Antarctica – image from AMSAT-DL

AMSAT-DL reports the antenna used by DP0GVN in Antarctica for the QO-100 geostationary satellite amateur radio transponder is completely destroyed.

According to the Alfred-Wegener-Institute (AWI), a severe winter storm hit Atka Bay (Antarctica) at the end of last week. At Neumayer Station III, about 20 kilometres away, wind speeds of max. 94.9 knots (175.7 km/h) were recorded as a minute average during the night from 13 to 14 August. The strongest gust was 112 knots (207 km/h). This is by far the highest wind speed in recent years.

Unfortunately, the satellite antenna for the geostationary QO-100 amateur radio satellite was also completely destroyed during the storm, despite the weatherproof radome, so no school contacts with DP0GVN can take place until further notice. AMSAT-DL and AWI hope to erect a new antenna early next year, in particular to continue the very successful contacts with schools.

Source AMSAT-DL
https://amsat-dl.org/en/dp0gvn-antenna-destroyed-rebuilding-planned-2022/
https://twitter.com/amsatdl

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m5aka

AMSAT-UK

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Guide to using FT4 on satellites

AMSAT-SM have published a guide to using the popular digital mode FT4 via the amateur radio satellites using SDR-Console software, a SDR receiver and the Icom IC-705 as the transmitter.

The guide covers:

• Step 1 – Setup SDR-Console and IC-705 with correct frequency

• Step 2 – Config WSJT-X

• Step 3 – Start Satellite External Radio in SDR-Console

• Step 4 – Select correct RX frequency in SDR-Console

• Step 5 – Find yourself on the satellite transponder

• Step 6 – Start calling CQ

• How to use a 2nd instance of WSJT-X for RX of your own FT4 signal

Read the guide at https://www.amsat.se/2021/08/15/ft4-via-satellite-with-sdr-console-and-ic-705/

Watch FT4 via AO-73 with SDR-Console and Icom IC-705

Get The Details…

m5aka

AMSAT-UK

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FT4 via the AO-73 CubeSat

Sweden’s AMSAT-SM has released a short video showing communications via the amateur radio satellite AO-73 (FunCube-1) using the popular digital mode FT4.

This is a short video of FT-4 communication via satellite AO-73 with SDR-Console V3.1 and Icom IC-705. It is a part of a guide that will be published later on AMSAT-SM web https://www.amsat.se/

In the first part you will see the first screen with SDR-Console with Airspy Mini as receiver, audio is piped to WSJT-X. You will also see SDR-Console handle the TX Doppler correction for the IC-705 via “External radio”.

In the second part you will see the second screen with WSJT-X connected to IC-705. The output was only one (1) to two (2) watts! You can see that WSJT-X is reading the Doppler corrected frequency. You will also see SDR-Console satellite tracking and PstRotator controlling the SPID RAS rotor.

Watch FT4 via AO-73 with SDR-Console and Icom IC-705

Get The Details…

m5aka

AMSAT-UK

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ISS SSTV Aug 6-7 145.800 MHz FM

ISS SSTV MAI-75 image 9/12 received by Chertsey Radio Club on Baofeng handheld

Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV images on 145.800 MHz FM using the SSTV mode PD-120.

The transmissions are part of the Moscow Aviation Institute SSTV experiment (MAI-75) and will be made from the amateur radio station RS0ISS in the Russian ISS Service module (Zvezda) using a Kenwood TM-D710 transceiver.

August 6, 2021 (Friday) from 10:50 GMT until 19:10 GMT*

August 7, 2021 (Saturday) from 09:50 GMT until 15:55 GMT*

*Dates and times subject to change.

The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at https://www.amsat.org/track/

ARISS SSTV Blog https://ariss-sstv.blogspot.com/

Useful SSTV info and links https://amsat-uk.org/beginners/iss-sstv/

Get The Details…

m5aka

AMSAT-UK

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