Universal Workplace and S-Band Communication aboard the International Space Station

Transcription

1 Universal Workplace and S-Band Communication aboard the International Space Station Dr.-Ing. W. Griethe Kayser-Threde GmbH Wolfratshauser Strasse 48 D München Tel: +49 (0) Fax: + 49 (0) gr@kayser-threde.de Köln, 27. März 2003

2 oduction universal workplace presently being built on the Service Module for the ISS a selfained communication system will be made available (CU). racteristics: Operational mid 2004 Commanding of the payloads from ground Transmission of payload data to ground Direct link to GSOC ground station in Weilheim/Germany Real-time operation possible CU increases the communication capabilities from/to ISS-RS substantially. CU is designed to allow connection to internal or external payloads. CU is well suited for applications from the ISS.

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4 scription of the Universal Workplace URM-D n n n n Modular Design Accommodation of several external payloads at the same time Usable for different payloads Located at the port side of the Service Module n Available in 2004

5 chnical Characteristics of URM-D (1) n Three external payload sites in the basic configuration n Extension structure of payload sites provides maximum availability of flight opportunities for the customers. n ayload dimensions (for transport): 400 x 500 x 1200 mm n ayload mass up to 150 kg n Mechanical interface to URM-D by active adapter

6 chnical Characteristics of URM-D (1), cont. n Good, unshaded visibility to zenith, nadir, port and wake n ower (28.5 V DC) available for operation and hibernation n ower consumption of up to 300 W per payload n Commanding of the payloads and data transfer via RS422 and Ethernet 10/100 BaseT n Digital and analogue I/O available n ISS On-board time available at the payload site

7 dicated Infrastructure for ayloads at URM-D-D n On-board Computer (OBC) n Communication Unit for ayloads (CU) n OBC connects the payloads to the S-band communication link (CU) n OBC enables commanding of the payloads, the processing of housekeeping data and the temporary storage of payload data

8 -Board Computer temp./voltage monitoring (to ISS-RS) input volt. + temp. n Accommodated inside the Service Module n owerful modern VME computer system (200 MHz ower C) OBC ower (from ISS-RS) oints (Robotic S/S) data sync SERCOS (MC) Main CU 1 2 ower Supply slot SCSI Ethernet ower HDD (optional) Data Ethernet (ISS-RS) n Sercos, Ethernet interface n Discrete and analogue I/O s Misc. I/O (I Carrier) 1 slot 3 1 COM1 n High data rate RS422 I/F (up to 4 Mbps) n TM/TC interface to CU DU carrier lock 6x ana CU (S-Band Comm's) CU (S-Band Comm's) data clock discr.rs422 I/O (I Mezz.) Ana In (I Mezz.) Comm's CU RSDEC (MC) slot 5 1 rear I/O wiring COM1 Test Ethernet (Test) CU (S-Band Comm's) data clock RSENC (MC) 2 2 Ethernet COM5 COM3/4 later option to expand VME backplane Video S/S OBC Box (w.r.t. connectors)

9 GROUND OUTDOOR ISS INDOOR ISS HK Data HK OWER ETHERNET OWER OWER ETHERNET OWER ETHERNET OWER ETHERNET OWER ETHERNET

10 mmunication Unit for ayloads (CU) Frequency range Data rate downlink Transmit modulation Data rate uplink Receive modulation ower supply ower consumption Average contact time to ground station Average number of orbits with contact to ground station TX MHz RX MHz 4 Mbps BSK 256 kbps BSK 20 to 36 Volts TX 30 Watts (max) RX 3 Watts (max) 7.5 minutes 5.7 per day

11 mmunication Unit for ayloads (CU), cont. he coverage time can be xpanded by adding dditional ground stations to SOC/Weilheim n MASALOMAS n KIRUNA n MOSCOW n VARIOUS RUSSIAN GROUND STATION

12 Russian Loutch (not launched) NASA TDRSS European Segment Columbus Russian Segment US Segment TV-S apenese Segment EM S-Band (TBD) S-Band (under developement) INDUSTRY RKK ZK ZU IHED Moscow Applied Research Institution Virtual Laboratory GSOC Col-CC EAC NASA Network KT