Author Topic: Ariane 5 (VA247): Hellas-Sat-4/SaudiGeoSat-1 and GSAT 31 (21:01 UTC) Feb 5, 2019  (Read 11027 times)

Online Lewis007

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Offline zubenelgenubi

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SFN Launch Schedule, update January 28
VA247 launch window on February 5: 2101-2149 UTC = 18:01-18:49 GFT (Local time)
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Offline SciNews

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Press release: For its first mission of 2019, Arianespace to launch two telecommunications satellites with Ariane 5
http://www.arianespace.com/press-release/for-its-first-mission-of-2019-arianespace-to-launch-two-telecommunications-satellites-with-ariane-5/

Offline bolun

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Offline worldtimedate

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Offline Satori

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Do we have the Ariane-5ECA serial number?

Offline Rik ISS-fan

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Do we have the Ariane-5ECA serial number?
Ariane space news release about this launch
VA247 = Ariane 5 launch 103 ; 70th Ariane 5 ECA.
AFAIK VA247 is the serial number.
« Last Edit: 01/31/2019 08:21 pm by Rik ISS-fan »

Offline russianhalo117

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Do we have the Ariane-5ECA serial number?
Ariane space news release about this launch
VA247 = Ariane 5 launch 103 ; 70th Ariane 5 ECA.
AFAIK VA247 is the serial number.
That is the mission number not the Launcher serial which is different format. Satori ask Jester or Jaq as they tend to post them time to time.

Offline Jester

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Do we have the Ariane-5ECA serial number?
Ariane space news release about this launch
VA247 = Ariane 5 launch 103 ; 70th Ariane 5 ECA.
AFAIK VA247 is the serial number.
That is the mission number not the Launcher serial which is different format. Satori ask Jester or Jaq as they tend to post them time to time.

Should be L5106

Offline bolun

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February 1, 2019

Launch readiness confirmed for Flight VA247’s Ariane 5: Approval is given for the first Arianespace mission of 2019

Arianespace’s year-opening Ariane 5 flight has been authorized for liftoff on February 5 following today’s launch readiness review, which was conducted at the Spaceport in French Guiana.

This milestone confirmed that the heavy-lift launcher and its dual-satellite payload – comprised of Saudi Geostationary Satellite 1/Hellas Sat 4 (HS-4/SGS-1) and GSAT-31 – are flight-ready, along with the Spaceport’s infrastructure and the network of downrange tracking stations.

With approval granted, Ariane 5 is cleared for Monday’s rollout from the Spaceport’s Final Assembly Building to its ELA-3 launch zone. Liftoff will occur the following day during a 61-minute launch window that opens at 6:01 p.m. local time in French Guiana.

Ariane 5 will deliver a total payload lift performance of 10,018 kg. on the mission to geostationary orbit, which is designated Flight VA247. This total includes the two satellite passengers, plus the workhorse vehicle’s dual-payload deployment system and integration hardware.

http://www.arianespace.com/mission-update/launch-readiness-confirmed-for-flight-va247s-ariane-5-approval-is-given-for-the-first-arianespace-mission-of-2019/

Offline Adonis1

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Offline input~2

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Quote
Composed of two payloads, Saudi Geostationary Satellite 1/Hellas Sat 4 also called HS-4/SGS-1, is a geostationary condosat for KACST (King Abdulaziz City for Science and Technology- Saudi Arabia) and Hellas Sat (Greece – Cyprus) which aims at providing telecommunications services in the Middle East, South Africa and Europe.
The Saudi Geostationary Satellite 1 communications payload will provide advanced Ka-band spot beam communications services for the Kingdom of Saudi Arabia’s KACST, including secure communications for the Gulf Cooperative Council region.
The Hellas Sat 4 communications payload, on the other hand, will offer advanced Ku-band regional beam communications services for Arabsat’s subsidiary Hellas Sat, a Greek-Cypriot satellite operator which provides services to leading Direct-to-Home (DTH) operators by delivering contents to more than three million households.
http://www.arianespace.com/press-release/for-its-first-mission-of-2019-arianespace-to-launch-two-telecommunications-satellites-with-ariane-5/
« Last Edit: 02/02/2019 10:24 am by input~2 »

Offline russianhalo117

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YouTube video has wrong title and is about HS-3.

Offline GWR64

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YouTube video has wrong title and is about HS-3.

 ??? don't understand

____________________________________

Arianespace Flight VA247 – Saudi Geostationary Satellite 1/Hellas Sat 4



Offline GWR64

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HS-4/SGS-1 on the Launch kit:
Quote
CUSTOMERS KACST (King Abdulaziz City for Science and Technology) and Hellas Sat (Arabsat)
MANUFACTURER Lockheed Martin Space
MISSIONS Telecommunications
MASS AT LAUNCH 6,495 kg.
PLATFORM Modernized A2100
ORBITAL POSITION 39° East
BATTERIES 2x Li-Ion
PAYLOAD Ku and Ka-band
COVERAGE AREA Europe, South Africa, Middle East
DESIGN LIFE More than 15 years (up to 23 years orbital maneuver)

HS-4 should reach the geo with chemical and electric engines.
Due to the high launch mass and the "up to 23 years orbital maneuver", I would guess
that there was a similar agreement as with Avanti for Hylas-4.
Later launch with a lighter partner.
Maximum fuel loading and the satellite may exceed the agreed mass.
Due to the additional chemical fuel, the GEO will reached faster.

Just a guess
« Last Edit: 02/03/2019 01:23 pm by GWR64 »

Online chetan_chpd

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excuse me for my lack of 'satellite know-how', please answer-> "Hellas-Sat-4/SaudiGeoSat-1 is actually one satellite hardware shared by two different users?".

Offline starbase

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Right. Two communication payloads from two different operators share the same satellite bus, which is called a "condosat".

Quote
Composed of two payloads, Saudi Geostationary Satellite 1/Hellas Sat 4 also called HS-4/SGS-1, is a geostationary condosat for KACST (King Abdulaziz City for Science and Technology- Saudi Arabia) and Hellas Sat (Greece – Cyprus) which aims at providing telecommunications services in the Middle East, South Africa and Europe.

http://www.arianespace.com/press-release/for-its-first-mission-of-2019-arianespace-to-launch-two-telecommunications-satellites-with-ariane-5/
« Last Edit: 02/04/2019 12:50 pm by starbase »

Online Lewis007

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Stéphane Israël posted some pics of the roll-out on Twitter.

Online chetan_chpd

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Right. Two communication payloads from two different operators share the same satellite bus, which is called a "condosat".

Quote
Composed of two payloads, Saudi Geostationary Satellite 1/Hellas Sat 4 also called HS-4/SGS-1, is a geostationary condosat for KACST (King Abdulaziz City for Science and Technology- Saudi Arabia) and Hellas Sat (Greece – Cyprus) which aims at providing telecommunications services in the Middle East, South Africa and Europe.

http://www.arianespace.com/press-release/for-its-first-mission-of-2019-arianespace-to-launch-two-telecommunications-satellites-with-ariane-5/

thanks. is there any specific reason for this sharing?
1. both parties work with each other for serving common geo-location?
2. Lockheed Martin finds it economical to integrate two customer payloads?

Offline eeergo

thanks. is there any specific reason for this sharing?
1. both parties work with each other for serving common geo-location?
2. Lockheed Martin finds it economical to integrate two customer payloads?

Hellas-Sat is a subsidiary of Arabsat, the owner of Saudi-Geo-Sat-1, so the satellite is entirely owned by them.

A fraction of the transponders is oriented toward the Greco-Cypriot subsidiary's market, but the condosat framework ensures savings by using a shared spacecraft bus (i.e. propulsion, avionics, power...) in a project where none of the two parties need the full communications payload that could be accommodated on the satellite. Of course, geographically it works too - Greece, Cyprus and Arabia aren't so far apart for a single GEO slot, and their target markets in Europe, Africa and the Middle East either.
-DaviD-

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