Space Environment Reliability Verification Integrated System
Space Environment Reliability Verification Integrated System (SERVIS; Japanese 実 証 衛星 2 号 機 , Jisshō Eisei 2-gōki , dt. "Detection satellite device no. 2") is the name of Japanese research satellites of the Institute for Unmanned Space Experiment Free Flyer (USEF) with a Commissioned by the New Energy and Industrial Technology Development Organization (NEDO). So far, two satellites have been launched from this program.
history
The SERVIS project was started in 1999 and is to be continued until 2011. The purpose of the project is to develop a parts database, an evaluation guideline for parts and equipment and a design guideline for commercial off-the-shelf parts and technologies (COTS) in space so that they can be used for space travel. This should serve to reduce costs and strengthen the market for Japanese satellites. During this time two test satellites were developed. The first satellite, SERVIS-1 was on October 30, 2003 at 13:43:42 UTC with a Rockot carrier rocket from the rocket launch site Plesetsk brought out in a polar orbit and worked for two years. The contract with Eurorocket to launch SERVIS-2 was signed on February 21, 2007. The launch of SERVIS-2 followed on June 2, 2010 at 01:59 UTC, also with a Rockot launcher from the Plesetsk rocket launch site. At 5:36 a.m. CEST (one hour and 37 minutes after take-off), SERVIS 2 was deployed by the upper level on the planned sun-synchronous runway at an altitude of around 1,200 kilometers.
technology
The two satellites are each about 2.5 m high. The energy supply system consists of solar panels with a span of 10.2 m, which achieve an electrical output of more than 1300 W, which they make available to the payload via a 50 V bus system. The payload, which weighs over 300 kg, has more than 500 W available. The satellites have 3-axis stabilization and the telemetry takes place with a bandwidth of 2 kBit / s (USB), 256 kbps (HSB) and 4 kbps (Command). 1 Newton hydrazine thrusters are available for orbit control . Ground control is provided by the USEF Space Operations Center (USOC) control center in Tokyo using the JAXA Ground Stations Network.
Experiments
In addition to the systems to be tested, there were also commercial electronic components on board for evaluation for use in space
| SERVIS-1 | SERVIS-2 | |
|---|---|---|
| SRAM | 1Mbit, 4Mbit | 4Mbit, 8Mbit |
| DRAM | 128Mbit, 256Mbit | 256Mbit, 512Mbit |
| SOI SRAM | 256kbit 0.35 µm rule | 128kbit 0.18 µm rule |
| FlashMemory | NOR 32Mbit | NOR 128Mbit |
| FPGA | SRAM type, EEPROM type | SRAM type, EEPROM type |
Nine experimental systems were carried on board the SERVIS-1. There were also nine experimental systems on board the SERVIS-2.
Web links
- SERVIS-1 in 2003 ( Memento from July 23, 2007 in the Internet Archive )
- http://www.eurockot.com/alist.asp?cat_id=106&main=3&subm=106 (link not available)
Individual evidence
- ↑ Jonathan McDowell: Launch Log. Jonathan's Space Report, accessed August 16, 2014 .
- ↑ Rockot transports SERVIS 2 into space
- ↑ a b USEF website for SERVIS ( Memento from March 7, 2012 in the Internet Archive )