Showing posts with label Amsat. Show all posts
Showing posts with label Amsat. Show all posts

Monday, February 22, 2016

Geostationary AMSAT Satellite (Phase 4) Spacecraft Covering the whole of Africa and Europe. (P4B)

I think this Satellite will open up one of the most exiting telecommunication capabilities for Africa and Europe.(P4A/B)

Coverage map
Phase 4 AMSAT planed

Qatar Satellite Company’s second satellite, Es’hailSat-2, will be placed in a geostationary orbit by a Space-X Falcon-9 rocket in December 2016. It will carry an AMSAT linear transponder as a secondary payload, giving Radio Amateurs access to a geostationary satellite for the first time.

Es’hailSat-2 will be “parked” 35 786 km above the equator at 25.5°East, nearly due North from Pretoria and Johannesburg (which are at 28°E).

Planned Frequency.

This satellite will have two linear transponders. (250 Khz and 8Mhz wide)
Narrowband transponder:
Uplinks: 2400.050 - 2400.300 MHz modes SSB and CW. 5 Watt uplink power,
Downlinks: 10489.550 - 10489.800 centre 10 489.675 MHz. Vertical polarization.

Wideband transponder:
Uplinks: 2401.500 - 2409.500 MHz
Downlinks: 10491.000 -10499.000 MHz 

It will be so nice to have fixed antennas mounted on mast pointing to the satellite having continuous communication to any where in Africa and Europe. HI ;-) ;-)

Will have to start looking for some equipment and antennas for this one.

Here is a list of Equipment that should work for the P4A satellite.

X-Band 10 GHz Downlink:

HailSat-2 Downlink configuration.


  • 89 cm dishes in rainy areas at EOC like Brazil or Thailand.
  • 60 cm around coverage peak,
  • 75 cm dishes at peak -2dB.
Narow Band : linear vertical polarisation.
  • Wide Band: linear horizontal polarisation.



S-Band 2.4 GHz Narrow Band-Uplink:


  • Narrow band modes like SSB, CW
  • 5W nominal Uplink power (22.5 dBi antenna gain, 75cm dish)
  • RHCP polarisation

S-Band 2.4 GHz Wide Band-Uplink (DATV):


  • Wide band modes, DVB-S2
  • Peak EIRP of 53 dBW (2.4m dish and 100W) required
  • RHCP polarisation

Azimuth and Elevation details for Johannesburg South Africa.

Azimuth and Elevation from Johannesburg


More information http://amsat-uk.org/2015/07/03/phase-4-spacecraft-frequencies/
and here http://www.itu.int/en/ITU-R/space/workshops/2015-prague-small-sat/Presentations/Eshail-2.pdf