Es'hail-2

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Es'hail-2
Qatar-OSCAR 100
QO-100
Start date November 15, 2018, 20:46 UTC
Launcher SpaceX Falcon 9
Launch site KSC LC-39A
COSPAR-ID : 2018-090A
Takeoff mass approx. 5300 kg
Manufacturer Mitsubishi Electric Corporation (MELCO)
lifespan 15 years
operator Es'hailSat Qatar Satellite Company
Playback information
Transponder Ku and Ka band ( satellite television ) as well as S and X band ( amateur radio service via satellite )
position
First position 26 ° East
List of geostationary satellites

Es'hail-2 (also Es'hailSat-2 , Arabic سهيل سات -2, AMSAT name : AMSAT P4-A ) is a television and amateur radio satellite of the Es'hailSat Qatar Satellite Company from Qatar . It is the first amateur radio satellite in geostationary orbit.

Manufacturer

Unlike the Es'hail-1 satellite, launched in 2013 , Es'hail-2 was manufactured by Mitsubishi Electric Corporation (MELCO) in Japan . The satellite was created in a cooperation of the Es'hailSat Qatar Satellite Company , the Qatari Amateur Radio Association Qatar Amateur Radio Society (QARS) and the German amateur radio satellite association Radio Amateur Satellite Corporation-Germany eV (AMSAT-DL eV).

begin

Es'hail 2 was originally scheduled to launch as the primary payload of a Falcon 9 in the third quarter of 2017. After the explosion of a Falcon 9 during a routine test run on September 1, 2016, the date was postponed. The launch finally took place on November 15, 2018.

Designations

Es'hail

"Es'hail" is the Arabic name for the star Canopus . This becomes visible in the Middle East in the night sky at the beginning of autumn. In the tradition it symbolizes luck in the expectation of the approaching winter with good weather.

AMSAT P4-A

AMSAT P4-A is the name of the satellite for the 4th of 5 phases of AMSAT to differentiate between mission targets. Accordingly, the 4th phase is characterized by geostationary orbit as the new and final milestone for amateur radio satellites in earth orbit .

Qatar OSCAR 100

After successful tests, the OSCAR number 100 was assigned by AMSAT-NA on February 3, 2019 , so that the satellite also bears the designation “Qatar-OSCAR 100” or QO-100

Payload for the amateur radio service via satellite

AMSAT P4-A has two transponders, a narrow band (500 kHz) and a wide band transponder (8 MHz) in the S and X bands or 13 cm and 3 cm bands for amateur radio services via satellites . The operating modes SSB and digital amateur radio television (DATV) in DVB-S2 are proposed for the transponders . Due to the use of non-inverted bent pipe transponders, the only limitation in the selection of the operating modes for operation via the transponders is their bandwidth. The narrowband transponder enables, for example, the simultaneous use by 50 SSB users or 7680 PSK31 users. On the broadband transponder z. B. simultaneously either two DVB-S2 users in HDTV or several in SDTV quality possible. An alternating pseudo beacon in DVB-S2 and DVB-S via the dedicated AMSAT uplink from the Es'hailSat Satellite Control Center (SCC) in Qatar is planned.

On March 22, 2020, AMSAT-DL President Peter Gülzow announced that the frequency 10.48986 GHz downlink or 2.40036 GHz uplink was to be reserved as an emergency radio frequency on the narrowband transponder; AMSAT asked them for the emergency radio to keep clear.

Narrow band transponder Frequency range [GHz] Operating mode Polarization type
Uplink 02.4 02.4005 SSB RHCP
Downlink 10.4895-10.49 SSB vertical
Wide band transponder Frequency range Operating mode Polarization type
Uplink 02,4015- 02.4095 DVB-S2 RHCP
Downlink 10.491-10.499 DVB-S2 horizontal

Special frequencies

Narrow band transponder Frequency [GHz] Operating mode Polarization type
Lower beacon 10.4895 CW F1A vertical
Medium beacon 10,489745 BPSK vertical
Emergency radio 10.48986 SSB vertical
Upper beacon (experimental) 10.489995 CW F1A and others vertical

reception

watch TV

Es'hail-2 is supposed to provide the MENA region ( Middle East and North Africa ) with direct satellite reception. In addition, Qatari government authorities are said to also use the satellite transponders. The transmission takes place in the Ku and Ka band.

Amateur radio

AMSAT-DL recommends using a commercially available parabolic antenna with a diameter of 60–90 cm as well as an LNB and DVB-T stick as SDR or 3 cm LNA with transverter for the 70 cm band for reception . Because of the large coverage zone that can be reached from geostationary orbit , for example, connections from amateur radio stations in India, Brazil and the Antarctic are possible via the transponders.

Es'hailSat Satellite Control Center (SCC)

The Es'hailSat Satellite Control Center (SCC) is in Qatar. For AMSAT there are a total of three AMSAT Ground Segments in Qatar, for reasons of redundancy two at the SCC and another at the Qatar Amateur Radio Society (QARS) in Doha .

See also

Web links

Individual evidence

  1. ↑ a b c Es'hail-2. Es'hailSat Qatar Satellite Company, accessed September 5, 2016 .
  2. ↑ SpaceX: Falcon 9 rocket and Amos 6 satellite destroyed in explosion on Cape Canaveral . heise.de, November 1, 2016.
  3. ^ SpaceX Launches Es'hail-2 Satellite. CDRinfo, November 15, 2018, accessed on November 16, 2018 .
  4. ↑ a b Es'hail-2 - Phase 4 at last! - AMSAT-DL - Peter Guelzow DB2OS on YouTube (English)
  5. ^ Paul Stoetzer: Es'hail-2 / P4A Designated Qatar-OSCAR 100 (QO-100). February 3, 2019, accessed February 3, 2019 .
  6. ↑ Peter Guelzow: New QO-100 band plan - AMSAT Germany. In: amsat-dl.org. AMSAT-DL , February 14, 2020, accessed on March 14, 2020 .
  7. ↑ Peter Gülzow: P4-A NB Transponder Bandplan and Operating Guidelines - AMSAT-Germany. In: amsat-dl.org. AMSAT-DL , October 19, 2018, accessed on March 14, 2020 .
  8. ^ Peter Gülzow: P4-A WB Transponder Bandplan and Operating Guidelines - AMSAT-Germany. In: amsat-dl.org. AMSAT-DL , September 17, 2018, accessed on March 14, 2020 .
  9. ↑ Es'Hail-2 Geostationary P4-A Transponder Frequencies. In: amsat-uk.org. August 8, 2016, accessed January 23, 2018 .
  10. ↑ Es'hail-2 ground station in Doha / Qatar . In: AMSAT-DL Journal . No. 3 vol. 43rd DARC Verlag, September 2016.
  11. ↑ Peter Guelzow: International QO-100 Emergency Frequency. In: AMSAT Germany eV Forum. March 22, 2020, accessed June 7, 2020 .
  12. ^ A b Katie Kriz: Es'hailSat Issues RFP for Second Satellite. March 21, 2014, accessed September 9, 2016 .
  13. ↑ Peter Gülzow: The new AMSAT-DL QO-100 DownConverter V3d - AMSAT-Germany. In: amsat-dl.org. AMSAT-DL , November 10, 2019, accessed on March 14, 2020 .
  14. ↑ QO-100 ground station arrived in Antarctica. In: AMSAT-Germany. Retrieved on May 21, 2020 (German).
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