Gonets

{{Short description|Russian civilian low Earth orbit communication satellite system}}

{{Use British English|date=August 2020}}

{{Use dmy dates|date=August 2020}}

{{Infobox spacecraft class

| name = Gonets

| names_list =

| image = File:Gonets-M-Salon-du-Bourget-2013-DSC 0043.jpg

| caption = A Gonets-M satellite at Salon du Bourget in 2013.

| manufacturer = NPO Prikladnoi Mekhaniki

| country = Russia

| bus = Gonets

| applications = Communications

| orbit_reference = Geocentric orbit

| orbits = Low Earth orbit

| operator = Gonets SatCom (1996-present)
Roscosmos (1992-1996)

| lifetime = 5 years (planned)

| derivedfrom = Strela

| status = Active

| built =

| launched =

| operational =

| failed =

| lost =

| first =

| last =

| retired =

| mass = 233 to 280 kg

| power = 40 watts from solar panels

| batteries = Nickel-hydrogen

| equipment = UHF transponders {{cite web|url=http://centaur.sstl.co.uk/SSHP/data/data_gonets.html|title=GONETS|work=Small Satellites Home Page|publisher=Surrey Satellite Technology Ltd|url-status=dead|archiveurl=https://web.archive.org/web/20080709033707/http://centaur.sstl.co.uk/SSHP/data/data_gonets.html|archive-date=9 July 2008}}
(B-band / D-band)
Data rate up to 64 kbit/s

}}

Gonets (Russian Гонец, for Messenger) is a Russian civilian low Earth orbit communications satellite system. It consists of a number of satellites, derived from Strela military communications satellites. The first two satellites, which were used to test and validate the system, were launched by a Tsyklon-3 launch vehicle from the Plesetsk Cosmodrome on 13 July 1992,{{cite web|url=http://www.astronautix.com/project/strela.htm|title=Strela|last=Wade|first=Mark|publisher=Encyclopedia Astronautica|url-status=dead |archiveurl=https://web.archive.org/web/20080526224743/http://www.astronautix.com/project/strela.htm|archive-date=2008-05-26}} and were designated Gonets-D.{{cite web |url=http://space.skyrocket.de/doc_sdat/gonets.htm|title=Gonets|last=Krebs|first=Gunter|publisher=Gunter's Space Page|access-date=8 September 2010}} The first operational satellites, designated Gonets-D1, were launched on 19 February 1996. After launch, the first three satellites were given military Kosmos designations, a practice which was not continued with the other satellites.

Ten operational satellites and two demonstration spacecraft have been placed in orbit. A further three were lost in a launch failure on 27 December 2000. A new series of modernised Gonets satellites, Gonets-D1M, supplement and replace the satellites which are currently in orbit. A single first D1M satellite was launched by a Kosmos-3M launch vehicle on 21 December 2005.{{cite web |url=http://space.skyrocket.de/doc_sdat/gonets-m.htm|title=Gonets-M|last=Krebs|first=Gunter|publisher=Gunter's Space Page|access-date=8 September 2010}} A second Gonets-D1M satellite was launched by a Rokot launch vehicle on 8 September 2010.

Operator

Gonets satellites are operated along with the third generation Luch satellites by Gonets Satellite System company. Gonets was originally a Roscosmos programme, but in 1996 it was privatised and operated by Gonets Satellite System,{{cite web|url=http://gonets.ru/english.htm|title=Leosat system "Gonets"|publisher=Gonets SatCom |archiveurl=https://web.archive.org/web/20080510055156/http://www.gonets.ru/english.htm|archive-date=10 May 2008}} which was controlled by ISS Reshetnev.{{cite web|url=http://gonets.ru/eng/about/investors.html|title=Investors - GONETS Leosat system|website=gonets.ru|url-status=dead |archiveurl=https://web.archive.org/web/20160416101058/http://gonets.ru/eng/about/investors.html|archive-date=16 April 2016}} In 2017, Roscosmos acquired 80% of Gonets SatCom from ISS Reshetnev. The remaining 20% were held by Dauria Satcom.{{cite news|url=https://www.kommersant.ru/doc/3275276|title="Гонца" отправили в "Роскосмос"|language=ru|trans-title=Messenger has been sent to Roscosmos|publisher=Kommersant|date=19 April 2017}} By 2018, Dauria Satcom sold the shares to Business-Sfera of Coalco group while Roscosmos sold 29% to other private investors. Gonets SatCom has become a Russian space industry company with the largest (49%) share of private capital.{{cite news|url=https://www.kommersant.ru/doc/3579802|title=Акционер достиг "Гонца"|language=ru|trans-title=A shareholder has reached the Messenger|publisher=Kommersant|date=23 March 2018}}

User characteristics

{{As of|2016}}, the Gonets orbit group comprises 25 second-generation spacecraft "Gonets-M" and 1 first-generation "Gonets-D1". The orbital group performs the task of direct communication with subscribers at any point of the globe. With such a number of spacecraft in the Gonets orbit group, the system provides communication with waiting time characteristics as indicated in the following table. The next 3 Gonets-M satellites will be launched in 2022 by an Angara-1.2 launcher from the Plesetsk cosmodrome.{{cite web|url=https://ria.ru/20190213/1550786125.html|title=Источник сообщил о планируемом запуске спутников "Гонец-М" ракетой "Рокот"|trans-title=Source informed about planned launch of Gonets satellites on Rokot|agency=RIA Novosti|date=13 February 2019|access-date=28 April 2021|language=ru}}

class="wikitable"

|+ waiting time characteristics{{Citation need|date=September 2023}}

! City, location !!   latitude   !! Session probability = 0.9 Waiting time !! Session probability = 0.8 Waiting time !! Session probability = 0.7 Waiting time

Meru, Kenya25.04 min19.98 min13.54 min
Fuli, Vietnam / Vitoria, Brazil20° / −20°19.47 min14.97 min8.85 min
Yerevan, Armenia / Wellington, New Zealand40° / −40°17.79 min12.04 min6.08 min
Belgorod, Russia / Isla Duque de York, Chile50° / −50°15.00 min8.19 min2.17 min
Vyborg, Russia / Orcadas Antarctic Station60° / −60°5.64 min1.78 min0.00 min
Kara Gate Straight, Barents Sea / Novolazarevskaya Station, Antarctic70° / −70°3.45 min0.00 min0.00 min
Gall Island, North Arctic Ocean / Antarctic Kunlun Station80° / −80°0.00 min0.00 min0.00 min
North Pole / Amundsen–Scott South Pole Station90° / −90°0.00 min0.00 min0.00 min

Technical characteristics of subscriber terminals 0.3–0.4 GHz

class="wikitable"
Transmitter power8–10 W
Positioning accuracy by GPS/GLONASSup to 10 m
ModulationGMSK
Power supplyAC 220 V, DC 12 V
Weight100–300 g
Bitrates: "Subscriber – Satellite"2.4–9.6 kbit/s
Bitrates: "Satellite – Subscriber"9.6–76.8 kbit/s

See also

{{Portal|Spaceflight}}

References

{{Reflist|2}}