1 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Universal Workplace and S-Band Communicationaboard the International Space Station
Dr.-Ing. W. GrietheKayser-Threde GmbH
Wolfratshauser Strasse 48D-81379 München
Tel: +49 – (0) 89 – 7 24 95 -128Fax: + 49 – (0) 89 – 7 24 95 -104
E-Mail: [email protected]
Köln, 27. März 2003
2 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
IntroductionOn a universal workplace presently being built on the Service Module for the ISS a self-contained communication system will be made available (CUP).
Characteristics:
n Operational mid 2004
n Commanding of the payloads from ground
n Transmission of payload data to ground
n Direct link to GSOC ground station in Weilheim/Germany
n Real-time operation possible CUP increases the communication capabilities from/to ISS-RS substantially.
n CUP is designed to allow connection to internal or external payloads.
n CUP is well suited for applications from the ISS.
3 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
4 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Description of the Universal Workplace URM-D
n Modular Design
n Accommodation of several external payloads at the same time
n Usable for different payloads
n Located at the port side ofthe Service Module
n Available in 2004
5 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Technical 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 Payload dimensions (for transport): 400 x 500 x 1200 mm
n Payload mass up to 150 kg
n Mechanical interface to URM-D by active adapter
6 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Technical Characteristics of URM-D (1), cont.
n Good, unshaded visibility to zenith, nadir, port and wake
n Power (28.5 V DC) available for operation and hibernation
n Power 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 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Dedicated Infrastructure for Payloads at URM-D-D
n On-board Computer (OBC)
n Communication Unit for Payloads (CUP)
n OBC connects the payloads to the S-band communication link (CUP)
n OBC enables commanding of the payloads, the processing of housekeeping data and the temporary storage of payload data
8 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
On-Board Computer
n Accommodated inside the Service Module
n Powerful modern VME computer system (200 MHz Power PC)
n Sercos, Ethernet interface
n Discrete and analogue I/O’s
n High data rate RS422 I/F (up to 4 Mbps)
n TM/TC interface to CUP
rearI/O
wiring
SERCOS(PMC)
P1
P1
P1
P2
P2
RSENC(PMC)
RSDEC(PMC)
J
J
Ana In(IP Mezz.)
discr.RS422 I/O(IP Mezz.)J
Main CPU
Comm's CPU
Misc. I/O(IP Carrier)
datasync
Joints(Robotic S/S)
dataCUP(S-Band Comm's)
CUP(S-Band Comm's)
6xanaCUP
(S-Band Comm's)
carrier lock
PDU
VMEback-plane
J2
J1
J1
J1
J2
J2
P2
J
J
Ethernet
COM1
J
COM3/4
Video S/S
Test
Ethernet(ISS-RS)
Power Supply
+12 -12+5
J
J
input volt. + temp.
OBC Power(from ISS-RS)
temp./voltagemonitoring(to ISS-RS)
OBC Box (w.r.t. connectors)
P
P
P
J
P
P
P
P
P
P
J
J
J
Pclock
data P
Pclock
COM1
J later optionto expandP
J Ethernet(Test)P
Ethernet
COM5
J
P
J P
SCSI
Power
HDD(optional)
Dataslot 1
slot 3
slot 5
9 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
ETH
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POW
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Dat
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ETH
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ET
POW
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PO
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ETH
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ETH
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10 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Communication Unit for Payloads (CUP)
5.7 per dayAverage number of orbits with contact to ground station
7.5 minutesAverage contact time to ground station
TX 30 Watts (max)RX 3 Watts (max)
Power consumption
20 to 36 VoltsPower supply
BPSKReceive modulation
256 kbpsData rate uplink
BPSKTransmit modulation
4 MbpsData rate downlink
TX 2200 – 2290 MHzRX 2025 – 2110 MHz
Frequency range
11 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Communication Unit for Payloads (CUP), cont.
The coverage time can be expanded by adding additional ground stations to GSOC/Weilheim
n MASPALOMAS
n KIRUNA
n MOSCOW
n VARIOUS RUSSIAN GROUND STATION
12 DLR-Workshop • „Satellitenkommunikation in Deutschland“ • Köln-Porz, 27.-28. März 2003
Russian Loutch(not launched)
NASATDRSS
VirtualLaboratory
ZUP
RKK
ZPK IHEDMoscow
GSOCCol-CC
EAC KT
AppliedResearchInstitutionIN
DU
STR
Y
Russian Segment
S-Band(under
developement)S-Band(TBD)
NASANetwork
Euro
pean
Seg
men
t
Col
umbu
s
US Segment
Jape
nese
Segm
ent
JEM
TV-S