Ekspress communications satellite series
On October 13, 1994, Russia launched its first Ekspress (Express) satellite, (officially designated Ekspress-2) representing a new generation of spacecraft designed to boost the capacity of the country's satellite communications network. The new system would replace obsolete Gorizont satellites, which had been in use since 1979.
The original network of Ekspress satellites developed by NPO PM in Zheleznogorsk was designed to provide an array of traditional communication services:
The 2.5-ton spacecraft would carry nine antennas and 12 transponders and it was designed to last between five and seven years.
The satellite bus would be equipped with a flight control computer and plasma thrusters for orbital correction, which would enable it to maintain its altitude with the accuracy of 0.2 degrees. Along with the Gals spacecraft, the Ekspress would be capable to maintain not only its longitudinal position over the Equator but the inclination of its orbit.
The Ekspress spacecraft would support the same communications networks that were previously serviced by the Gorizont satellites, including TV Moskva system. Thanks to more powerful hardware onboard Ekspress, the diameter of ground antennas targeting the satellite could be reduced from 4.5 meters to 2.5 meters. (126)
Russia planned several positions on the geostationary orbit with following coordinates for the Ekspress birds: 14 and 11 degrees West, 40, 53, 80, 90, 96.5, 103, 140 and 145 East longitude. (204) Although as many as 13 spacecraft had been planned for launch, only the second spacecraft -- Ekspress-6 -- made it to orbit on Sept. 26, 1996, before a new round of upgrades to its communication payload was required.
During 1990s, NPO PM proposed a number of upgrades to the Ekspress spacecraft with ever increasing power and communication capacity. The Ekspress-M series was proposed around 1993, however project could not be funded in the wake of Russia's financial problems.
In the second half of the 1990s, NPO PM proposed Ekspress-A, -K1, -K2, and -K3 series of satellites, which would be developed in parallel and launched between 1999 and 2002, gradually building up the communication capacity, power and life span. The company also sought Western subcontractors to develop more reliable and powerful communication payloads for its next-generation satellites.
The first upgraded satellite, designated as Ekspress-A1, and carrying communication payload build by Alcatel of France, reached the launch pad in 1999, more than three years, after the last spacecraft from the original Ekspress series was launched. It was scheduled to take orbital position of 80 degrees East over the Equator replacing the ailing Ekspress-6. Ekspress-A1 had 12 Alcatel-built transponders, while Ekspress 6 (No. 12) has 10 C-band operational transponders.
However minutes after the launch on October 27, 1999, second stage of the Proton rocket, carrying the spacecraft failed and crushed in the Eastern Kazakhstan.
The second and successful attempt took place on March 12, 2000, 0400 GMT. The Proton's Block DM upper stage performed two burns sending the 2,642-kilogram spacecraft toward its geostationary orbit 80 degrees East longitude over the equator. On May 12, 2000, the Ekspress-6A reached its target position 80 degrees East of the Equator, replacing the Ekspress-6 spacecraft. With a projected service life of five years, the spacecraft functioned until December 2015.
The success with the the launch of the second Ekspress-A satellite allowed Russia to preserve satellites' orbital positions, which the country registered in previous years, but which could expire unless an actual spacecraft had been placed there.
The officials at Russia's Satellite Communications Company, RSCC, which since 1992 was entrusted with handling nation's comsats, came up with an intricate orbital chess match which would also allow older spacecraft with diminished capabilities to be replaced with newer, more powerful hardware.
As of March 2000, RSCC officials planned that the older Ekspress 6 (No. 12) spacecraft then hovering over 80 degrees east longitude would be moved farther east to the orbital position of 140 degrees east longitude.
In turn, the Gorizont 33 (Statsionar 7) spacecraft, which then occupied the position of 140 degrees east longitude, had only five C-band transponders that are operational.
Around the same time (March 2000), Alcatel delivered a communications payload with 12 transponders for another Ekspress A spacecraft. The Ekspress 3-A satellite was set for launch in June 2000 into orbital position 11 degrees West, where it would replace Gorizont 37 (Statsionar-11), which had only 7 working C-band transponders.
The old Ekspress-6 eventually moved into position of 103 degrees East, taking over duties of the obsolete Gorizont-36 satellite. Finally, Gorizont-33 moved further east to 140 degrees East, replacing Gorizont-33.
Ekspress satellite bus series
Confusingly, ISS Reshetnev, the manufacturer of the Ekspress series, also used the same name for its standard satellite buses which served as platforms for various spacecraft. Ekspress-1000N and Ekspress-2000 platforms were in development during 2010s. The Ekspress-2000 satellite bus was a basis for Ekspress-AM6, which was under construction in 2012.
Ekspress-A3 (No. 3)
On June 23, 2000, a technical glitch forced to scrub the launch of a Proton booster from Baikonur Cosmodrome with the Ekspress-A3 satellite.
The mission was to lift off at 8:34 p.m. EST, 4:32 a.m. Moscow Time. However, the ground personnel encountered the problem around midnight Moscow Time on June 23, during the fueling of the vehicle, representative of Russian Aviation and Space Agency, Rosaviacosmos said. The launch was then rescheduled for 4:28 a.m. Moscow Time June 24 (8:28 p.m. EST June 23).
2000 June 24: The rocket carrying Ekspress-3A communications satellite lifted off into the night sky over Baikonur Cosmodrome in Kazakhstan at 8:34 p.m. EST (4:32 a.m. Moscow Time on June 24). After a ten-minute powered flight, the Proton's third stage delivered the satellite and its Block DM upper stage into the initial parking orbit.
In the next six-and-half hours, the upper stage fired its engines two times inserting the Ekspress comsat into its final orbit 36,000 kilometers over the Equator. The satellite was positioned 11 degrees West latitude, where it took over the duties of the old Gorizont 26 spacecraft.
The Ekspress As are equipped with 17 communications transponders built by Alcatel Espace of France. The Russian Satellite Communications Company, RSCC, owns the Ekspress-series spacecraft, while Moscow-based Intersputnik is their primary user.
The launch of the Ekspress 3-A came in the midst of the biggest backlog in Proton schedule in years. In addition to the June 6, 2000, launch, two Proton missions were competing for a launch window at the end of June 2000.
2002 June 10: The Proton rocket successfully launched Russian communications satellite. The four-stage booster blasted off at 05:14 Moscow Time from Baikonur Cosmodrome, carrying Ekspress-A1R satellite, which belongs to Russia's State Company for Space Communications, GPKS. The spacecraft was built as a replacement for the first Ekspress-A satellite lost in the Proton rocket failure in October 1999.
The Ekspress-A1R is equipped with 12 transponders, transmitting signals in C-band, 5 in Ku-band and one in L-band and it was expected to have a life span of seven years.
The satellite, positioned in the equatorial orbit over the point 40 degrees Eastern longitude, will provide TV, radio and Internet services across the former Soviet Union. The spacecraft became the fourth and the last in the Ekspress-A series developed by NPO PM enterprise based in Zheleznogorsk, Russia. The French company Alcatel Space Industries supplied communications payload for the spacecraft.
2003 Dec. 29: The Russian Proton rocket successfully delivered a spacecraft for the nations satellite communications company, RSCC.
The Proton K vehicle with Block DM upper stage blasted off from Site 200 at Baikonur Cosmodrome at 04:00 local time on December 29, 2003 (2300 GMT on Dec. 28), carrying Ekspress-AM22 spacecraft for Russian Satellite Communications Company, RSCC.
The third stage of the Proton rocket inserted Block DM/Ekspress-AM22 combination into an initial low Earth orbit, and the upper stage conducted two firings to raise the apogee and circularize the orbit at the altitude of 36,000 kilometers over the Equator.
The Ekspress-AM22, built by NPO PM development center in Zheleznogorsk, Russia in cooperation with Alcatel Space, has a projected life span of 12 years. The spacecraft carries 24 transponders and is expected to operate in the orbital position 53 degrees Eastern longitude over the Equator.
The spacecraft was declared operational on March 9, 2004.
2004 April 27: In its third mission in six weeks, the Proton rocket successfully delivered a payload into geostationary orbit.
The Proton K vehicle equipped with Block DM upper stage blasted off from Pad 39 at Site 200 of Baikonur Cosmodrome at 00:37 Moscow Time on April 27, 2004, carrying the Russian communications satellite Ekspress-AM11.
According to RKK Energia, the Block D manufacturer, the spacecraft and the upper stage separated at 07:10 Moscow Time on April 27. The satellite successfully reached the geostationary orbit.
The spacecraft was declared operational on July 1, 2004. It was placed at the operation position 96.5 degrees East over the Equator.
On March 29, 2006, Russian Satellite Communications Company, RSCC, the satellite operator, announced that at 03:41 Moscow Time Ekspress AM-11 suddenly failed. According to the preliminary analysis by NPO PM, the satellite manufacturer, the failure took place as a result of a sudden external impact, which led to immediate release of fluid from the thermal control system. In its turn, venting liquid led to the loss of the attitude control by the spacecraft, rendering it useless.
RSCC made effort to transfer the satellite's communications functions to other spacecraft, while by March 30, 2006, ground controllers managed to restore the attitude control onboard Ekspress AM-11. However, they also found that the temperature onboard the satellite was approaching critical, threatening a complete loss of control over the vehicle. To avoid leaving the dead satellite in the operational orbit, at 14:00 Moscow Time, a sequence was initiated to direct the satellite into the "burial" orbit. On April 28, 2006, RSCC said that the satellite was parked in its final orbit 290 kilometers higher than geostationary orbit and all its systems were intentionally turned off.
2004 Oct. 30: The Russian Proton rocket successfully delivered a spacecraft for the nations satellite communications company, RSCC.
The Proton K rocket with Block DM-01 upper stage blasted from Pad 39 at Site 200 at Baikonur Cosmodrome at 02:11 Moscow Time, on October 30, 2004, carrying the Ekspress-AM1 satellite. After two firings of the upper stage, the payload successfully reached its final geostationary orbit at 08:45 Moscow Time on the same day. The satellite is to be positioned at 40 degrees East over the Equator.
This was the third out five satellites in the series slated for launch before the end of 2005. The spacecraft was developed by NPO PM of Zheleznogorsk in cooperation with NEC NTS Space of Japan, Sodern of France and European consortium Astrium. Its payload, including nine C-band, 18 Ku-band and one L-band transponders, is designed to provide digital TV broadcasts, telephone communications and broad-band Internet access.
The launch of the Ekspress-AM1 was delayed from August 2004 and Oct. 28, 2004.
At the time of the launch, the spacecraft was expected to enter service at the beginning of 2005. It was officially declared operational on Feb. 1, 2005, and was expected to function for 12 years. However in April 2010, the satellite lost capability to maintain its orbital inclination, which limited its functionality to 12 hours a day. On August 12, 2013, ground controllers started maneuvering the spacecraft into a burial orbit. At the time, Ekspress-AM1 was to be replaced by Ekspress-AM7 spacecraft, than slated for launch in the fall of 2014 into the same orbital position of 40 degrees East longitude, RIA Novosti reported.
2005 March 30: In its second mission since the beginning of the year, the Proton rocket successfully launched a Russian communications satellite. The Proton-K, equipped with Block DM upper stage, blasted off from Baikonur Cosmodrome on March 30, 2005 at 01:31 Moscow Time, carrying Ekspress-AM2 spacecraft for Russian Satellite Communications Organization, RSCS.
According to Russian officials, the satellite separated from the upper stage of the launch vehicle at 08:05 Moscow Time on the day of the launch. The spacecraft, built by NPO PM in Zheleznogorsk with the participation of Alcatel Space of France, is expected to operate in a geostationary orbit of 80 degrees West longitude over the Equator for the next 12 years.
The launch of the Ekspress-AM2 spacecraft had been earlier planned for December 2004, however it was reportedly delayed by the lack of funding for the manufacturing of the launch vehicle.
2005 June 24: The modernization of Russia's satellite communications network received a new bird in June 2005.
A Proton-K (No. 410-07) equipped with Block D (11S861 No. 103L) upper stage and carrying the Ekspress-AM3 comsat for the Russian Satellite Communications Organization, RSCS, blasted off from Baikonur Cosmodrome's Pad 39 at Site 200 on June 24, 2005 at 23:41 Moscow Time.
The launch of the Ekspress-AM3 spacecraft completed the modernization of the country's communications network. It was the fifth and last satellite of this type launch in the past two years. The spacecraft has a lifespan of 12 years. The mission was originally scheduled for June 23, 2005.
The next generation of spacecraft was expected to reach launch pad in 2007.
2008 Jan. 28: Russia launched an Ekspress-series communications satellite in the pre-dawn hours of Monday.
The Proton-M rocket equipped with Briz-M upper stage lifted off on Jan. 28, 2008, at 3:18:00 Moscow Time from Site 200 in Baikonur Cosmodrome. It carried the Ekspress-AM33 spacecraft toward the geostationary orbit, developed by NPO PM of Zheleznogorsk for Russia's Satellite Communications Company, RSCC.
Russian space agency, Roskosmos, reported that the Briz-M upper stage and its payload successfully separated from the rocket and continued its path toward its final orbit. The 2,600-kilogram Ekspress-AM33 satellite was to be placed at 96.5 degrees East longitude above the Equator, where it was expected to function for 12 years.
The launch of Ekspress-AM33 was previously expected in September 2007.
2009 Feb. 11: A Proton M rocket equipped with Briz-M upper stage lifted off from Site 200 in Baikonur Cosmodrome on Feb. 11, 2009, at 03:03 Moscow Time, carrying Ekspress-AM44 and Ekspress-MD1 communications satellites for Russia's Satellite Communications Organization. The Briz-M upper stage and the third stage of the launch vehicle separated at 03:12 Moscow Time. After a series of firings of the upper stage, Ekspress-AM44 separated at 12:15:30 Moscow Time followed by Ekspress-MD1 at 12:29:40 Moscow Time, as planned and in the correct orbit, Russian space agency said.
The 2,560-kilogram Ekspress-AM44 satellite was manufactured by Reshetnev enterprise (formerly NPO PM) with Thales Alenia Space as a supplier of the communications payload. The spacecraft has a projected life span of 12 years.
The 1,140-kilogram Ekspress-MD1 satellite was developed by Khrunichev enterprise and should remain in service for 10 years. Structurally, it was built around the cylindrical adapter connecting the Briz-M upper stage with the main payload (Ekspress-AM44). The same principle was used in the development of the KazSat satellite.
The mission was originally scheduled for December 2007, June, August, Sept. 25 and December 2008.
2011 Aug. 18: Russia's workhorse rocket failed again after only three successful missions. A Proton rocket with the Briz M upper stage lifted off from the Baikonur Cosmodrome in Kazakhstan on August 18, 2011, at 01:25 Moscow Summer Time carrying the Ekspress-AM4 satellite for Russia's Satellite Communications Organization. According to the International Launch Services, ILS, which markets the Proton outside Russia, the vehicle performed nominally with the Briz M upper stage and the spacecraft separating at the appropriate time. However, the contact with the Briz M and spacecraft was lost after the fourth burn of the upper stage, ILS said. Roskosmos specialists were then able to locate the upper stage and efforts were underway to establish contact with the Ekspress-AM4 spacecraft.
In the wake of the launch failure, a Russian State Commission of inquiry has been established and has begun the process of determining the reasons for the anomaly. ILS promised to release details when data become available. In parallel with the State Commission, ILS said it would form its own Failure Review Oversight Board (FROB). The FROB was to review the commission’s final report and corrective action plan, in accordance with U.S. and Russian government export control regulations.
This mission was previously expected to take place in the second half of 2010.
In the wake of the Ekspress-AM4 loss, the satellite's operator, GPKS, promised to launch a replacement spacecraft by 2015. Deputy Director General at GPKS, Evgeny Buidinov, said that the easiest way to replace Ekspress-AM4 would be to build an exact copy based on the existing blueprints. The new satellite would be designated Ekspress-AM4R, where "R" stood for "replacement." According to Buidinov, some international or foreign satellites could be used at the orbital position 80 East longitude over the Equator, to provide planned service in the interim. The insurance payments for the lost satellite were not going to compensate lost profits, which were expected during projected three years before the arrival of the replacement satellite, Buidinov said. (516)
On Dec. 29, 2012, EADS Astrium outcompeted Thales Alenia Space, MacDonald, Dettwiler and ISS Reshetnev in a bid to get a contract from Russian satellite communications company, GPKS, to develop the Ekspress-AMU1 satellite scheduled for launch in the fourth quarter of 2015. The spacecraft was launched on December 25, 2015.
Proton launches Ekspress-AM5 communications satellite
A Proton rocket concludes the world's orbital launch attempts in 2013 with a mission to deliver the most advanced Russian communications satellite Thursday.
The launch of the Proton-M rocket with a Briz-M upper stage from Pad 24 at Site 81 in Baikonur Cosmodrome took place as scheduled on Dec. 26, 2013, at 14:49:56 Moscow Time (5:49 a.m. EST). The vehicle was carrying the Ekspress-AM5 communications satellite for Russian Satellite Communications Company, RSCC.
Proton delivers a pair of Ekspress satellites
A Proton-M/Briz-M launch vehicle lifted off from Baikonur Cosmodrome's Pad 24 at Site 81 on March 16, 2014, at 03:08 Moscow Time (7:08 p.m. EST on February 15). The rocket carried Ekspress-AT1 and Ekspress-AT2 communications satellites for Russian Satellite Communications Company, RSCC.
As of 2015, a pair of mid-size satellites was planned for launch on a single (Proton-M?) rocket in 2018 for the Russian operator Kosmicheskaya Svyaz. (The mission was previously expected in 2016.) Ekspress-AMU7, built first, would carry payload supplied by Thales Alenia Space, while the follow-on Ekspress-AMU3 would be equipped with Russian-built transponders, as a response to Western sanctions introduced in 2014 after the events in Ukraine. Both satellites would carry 20 C-band transponders, 16 Ku-band transponders and 1 L-band transponder. Ekspress-AMU7 would be stationed at 145 East longitude and Ekspress-AMU3 at 96.5 East.
Proposed Ekspress missions
Originally planned for 2018: A Proton-M/Briz-M rocket to launch the Ekspress-AMU3 and Ekspress-AMU7 communications satellites from Baikonur. (The launch was originally planned in 2016, but by the beginning of 2015, the mission was postponed to 2018.)
An Ekspress series overview:
Technical comparison of the Ekspress and the proposed Ekspress-M satellite:
A complete list of Ekspress missions:
Artist rendering of the Ekspress spacecraft circa 1993. Credit: NPO PM
Coverage area of the Ekspress system. Credit: NPO PM
Artist rendering of the Ekspress M spacecraft circa 1993. Credit: NPO PM
Coverage area of the Ekspress M system. Credit: NPO PM
Artist rendering of the Ekspress A spacecraft circa 2000. Credit: RSCC
Scale model of the Ekspress AM-1 spacecraft presented at the Le Bourget Air and Space Show in 2001. (Note enlarged solar arrays first proposed for Ekspress M, as well as "squashed" rather then cylindrical body.) Copyright © 2001 Claude Mourier
The Ekspress-A1R during pre-launch processing in 2002. Credit: NPO PM
The Ekspress AM-22 during pre-launch processing in 2003. Credit: NPO PM
The payload section of the Proton rocket with Ekspress-MD1 (left) and Ekspress-AM44 satellites, which were launched in February 2009. Credit: Roskosmos