Satellite QO-100

The geostationary satellite Es’hail-2 carrying amateur radio transponders launched from Kennedy Space Center at 20:46 GMT on Thursday, November 15, 2018 and is now in a geostationary orbit at 25.9° East.

These are the first amateur radio transponders to be put into geostationary orbit and they are expected to link radio amateurs from Brazil to Thailand.

Es’hail-2 carries two Phase 4 amateur radio transponders operating in the 2400 MHz and 10450 MHz bands. A 250 kHz bandwidth linear transponder intended for conventional analogue operations and an 8 MHz bandwidth transponder for experimental digital modulation schemes and DVB amateur television.

The extent of the satellite coverage is shown below.

QO-100 (P4-A) – AMSAT-Deutschland

It is very easy to listen the the voice narrow band transponder traffic by using the BATC web SDR

I have been operating via the QO-100 satellite almost from day one and you can view the online logbook here .

QO-100 and LEO operating position

Transmission / Reception.

ADALM-PLUTO Software Defined Radio – SDR

Amsat UK Filtered S Band Driver Amplifier

Amsat UK 5 watt 2.4 GHz amplifier

The output from the PA is fed via a short length of LDF4-50 coax to a Potty Patch dual band feed and a 1.2 metre offset dish.

And on receive a bullseye LNB with bias tee connected to the receive port on the Pluto

All of the above is controlled by the SDR console software running on Windows 11 I5 PC

For use on the wideband DATV transponder the following equipment will be used for transmission:

BATC Portsdown Four transmit / receive system

USB camera

Lime mini SDR

Amsat UK Filtered S Band Driver Amplifier

PA surplus 2.4 Ghz amplifier

Windows 11 I5 PC running OBS and F1EJP script for FFMPEG

The output from the PA is fed via a short length of LDF4-50 coax to a Potty Patch dual band feed and a 1.2 metre offset dish.

Reception

And on receive a bullseye LNB with bias tee on the 1.2m offset dish

BATC  MiniTiouner receiver

BATC Ryde receiver

Satellite dish in use at GU6EFB QO-100 station

For more information see:

Amsat DL https://forum.amsat-dl.org/

Amsat UK https://amsat-uk.org/

British Amateur Television Club https://batc.org.uk/

SDR Console Software https://www.sdr-radio.com/