communication systems - tesat.de · folio and equipment know-how • our extensive expertise with...
TRANSCRIPT
Facts - Products - aPPlications
communication systems
2 3
1. the BeneFits
2. the Products
3. the Facilities
4. the mission
page 4
page 6
page 20
page 24
high technology For the gloBal satellite market
the World oF tesat-sPacecom
amplifierproducts
passive Micro-wave products
Communication Systems
Datalinkproducts
Laserproducts
partsagency
Our product offerings encompass highly reliable equipment as for ex-ample the travelling wave tube ampli-fiers, multiplexers, waveguide switches, and modulators, which along with com-plete systems are delivered to all lea-ding satellite manufacturers worldwide.
Therefore, we offer the complete communication technology necessary to disseminate television signals via satel-lite to each household on ground. More than half of all communication satellites
in orbit operate with Tesat equipment on board. The future global commu-nication infrastructure has to support security-related real time applications with ubiquitous coverage. This will only be viable with most advanced commu-nication systems operating in space.
Tesat has successfully developed the key element for this space infra-structure, the optical broadband Laser Communication Terminal (LCT). Using lasers, such terminals can transmit
data and imagery between satellites and from satellites to ground at un-precedented data rates. We at Tesat have demonstrated for the first time the operational capabilities of such broadband LCTs in space. given our competitive position in the commercial satellite market and our top quality standards, Tesat products are today the first choice for various satellite-based systems operated by several governments worldwide for security and defense related applications.
Over the course of five decades, Tesat-Spacecom has developed in-depth expertise in manufacturing of payload equip-ment for communication satellites and has established itself as a clear european market leader. On its 60,000m² premises in Backnang, germany, 1,200 employees develop, assemble, integrate, and test systems and equipment for telecom-munication via satellite. To date, more than 700 space projects have been completed. The accumulated in-orbit lifetime heritage exceeds 250 million hours.
5
*Activities covered under Small GEO ESA program
Starting point is the transformation of mission or payload requirements into subsystem and equipment speci-fications as well as design and layout optimization with respect to perfor-mance, energy efficiency, geometry, mass and further customer-specific requirements. We take advantage of exceptional knowledge and heritage as well as cutting-edge technologies on equipment level all available at
the Tesat site. With this, we enable system designs that are optimized to fulfill the need of our customers. Our focus is on customer specific solutions, with priority on small and medium sized communication payloads inclu-ding Hybrid Optical/RF Relay pay-loads, making Tesat a predestinated hosted payload supplier.
1 Our customers benefit from:
• Our comprehensive product port-
folio and equipment know-how
• Our extensive expertise with regard
to system engineering, design, ana-
lysis, simulation, integration and test
• The in-house Parts Agency
• Our well-established procurement
management based on long-term
customer-supplier-relationships
• The application of state-of-the-art
technologies and processes
• The multitude of available engi-
neering and design tools covering
electrical, mechanical, thermal and
radiation aspects.
tesat – a one-stoP-shoP
the BeneFit
Why use tesat´s communication Payloads?Tesat is a one-stop-shop for your program: We cover all aspects and tasks necessary for a successful payload program incl. integration and test (aIT) as well as in-orbit testing. Our core competencies are design, architecture and analysis of end-to-end payloads and Repeaters as well as project and procurement management.
Payload layout
Includes reflector antennas and direct radiating array antenna.
7
*Act
iviti
es c
over
ed u
nder
Sm
all G
EO E
SA p
rogr
am
Product scoPeThe product scope of Communication Systems comprises two key products – the Data Downlink Subsystem family and the Repeaters / payloads including the unique configuration of a Hybrid Relay payload featuring Laser ISL (Inter-Satellite-Link) with multi-channel Ka-Band downlink.
2 doWnlink suBsystems
for eO / Science X- / Ka-Band QpSK / 8-pSK
rePeaters & Payloads
for Telecommunication,all frequency ranges
doWnlink suBsystems - rePeaters & Payloads
the ProductsNext generation: 16/32/64-apSK
8 9
Communication Systems of Tesat offers a variety of Data Downlink Sub-systems to satisfy these requirements. The below picture illustrates the two basic principles for data transmission from LeO to ground:
• Direct data transmission between the LeO satellite and the ground station in X-Band or Ka-Band
• Data transmission via data relay sa-tellites based on RF or Optical Inter-Satellite-Links (ISL) between LeO
and geO and transmission of data from geO to LeO in Ka-Band (multi-channel configuration possible for higher data rates).
earth observation is essential for improving our understanding of the planet´s environment as well as its past and future. Based on sophisticated sensor designs and applications the amount of collected data is increasing and the demand for a transmission at higher data rates is an immediate consequence.
earth oBservation (eo) satellite doWnlinks
LeO – earth Observation Satellite
Typical contact times:
LeO - gS: 10 min
LeO - geO - gS: 45 min
groundstation (gS)
geO – Data Relay Satellite
Instrument (Camera, Sensor)
MassMemory
MassMemory
data doWnlink suBsystems
Tesat is a one-stop-shop that in-cludes all engineering services (RF, layout, interfaces, reliability), procure-ment, project management, subsystem assembly, integration and test in Back-nang. In addition, support for system level activities can be offered and test systems can be delivered, if requested by the customer.
Downlink Subsystems for earth observation and military missions are available in X-Band (8 - 8.4 gHz) with QpSK and 8-pSK modulation and Ka-Band (25.5-27 gHz) with QpSK modu-lation. The products are designed for LeO as well as geO applications with a lifetime of up to 15 years.
Tesat features a long and very successful heritage for Downlink Subsystems since more than 20 years starting with envisat. Based on cutting-edge techno-logy, we provide Downlink Subsystem concepts to fulfill the growing data rate requirements.
Modula
tor
Amplifie
r
Tesat products
procurable products
Switc
h
Filter
antenn
a
LeO – earth Observation Satellite
10 11
TWT
EPC
TWT
EPC
TWT
EPC
Att
Att
AttA3
A1
A2 ISOL2
ISOL3
ISOL1
TWTA 1 hot
TWTA 2 hot
TWTA 3 cold
RHCP TX
LHCP TX
F eedS yste m
LowpassBandpass
LowpassBandpass
f1
f2
Optional Feedback Loop
Optional Feedback Loop
Optional Feedback Loop
WGS 1
WGS 3
WGS 2
Modulator 1, hot
Flow Ctrl
Data GigabitModulator
Data
RTR
Modulator 3, cold
Flow Ctrl
Data GigabitModulator
Data
RTR
Modulator 2, hot
Data GigabitModulator
Data
RTR
Flow Ctrl
ModulationScheme
CodingScheme
BandMax. User Data Rate
per Channel (Mbit/sec)Availability
QpSK Hardkeyed None X 350 available
8-pSK 4D-TCM, r=5/6 X 500 available
64-apSK SCCC, r=0.9 X 1,200 under development, available 2017
QpSK Hardkeyed None Ka 600 available
32-apSK SCCC, r=0.82 Ka 2,000 under development, available 2017
next generation doWnlink suBsystems-concePtx-Band / ka-Band doWnlink suBsystems
• High flexibility in order to cope with changing needs respecting data rates and link conditions
• Digital predistortion for linearization based on post-TWTa feedback loop
• Considerably higher data rates
• Bandwidth-efficient modulation schemes (16/32/64-apSK)
• powerful coding schemes (SCCC)• Digital predistortion allowing a
linearisation of the high power amplifier
The block diagram below shows an example for a next generation X-Band Downlink Subsystem with a data rate up to 2,400 Mbit/sec (1,200 Mbit/sec per channel) with 64-apSK modulation and powerful SCCC coding.
examples for achievable data rates depending on modulation and coding schemes as well as the utilized frequency band (data rates can be doubled with a dual channel architecture):
Tesat currently develops a next generation data Downlink Subsystem to strengthen its position as the leading supplier for high data rate Downlink Subsystems – as future eO projects and relay missions will require:
QpSK
8-pS
K
16-a
pSK
Data Downlink Subsystem architecture with two active channels and dual polarization antennaX-Ba
nd &
Ka-
Band
Dow
nlin
k Su
bsys
tem
s in
Tes
at‘s
AIT
Are
a.
Bandwidth effeciency
12 13
Optical Linkup to 1,8 gbit/sec
Ka-Band RF Link
LeO
geO
groundstation (gS)
GEO Interface Unit Digital processing, coding (optional
encryption)
Modulators
High Power Amplifiers
Multiplexers
EARTHTransmission Time
1 Orbit Duration
LEO – GSdirect transmission
LEO – GEO – GSvia relay transmission
Laser beam
GEO
EARTHLEO
LEO
*+
1.2
• High throughput allows transfer of high data volumes
• High immunity against jamming and lowest intercept probability due to narrow beam width
• No ITU frequency regulations in the optical spectrum
• Beam hopping to serve a fleet of LeOs
• Near real time data transmission during LeO-geO sightline
• Significant enlarged time-window for data transmission
The capability to combine laser communication (between LeO and geO satel-lites) with RF communication (geO to earth) is a unique feature of Tesat payloads. The two European Data Relay Satellites are the very first applications for this type of Optical / RF payloads worldwide. Tesat-Spacecom is very proud to be the selected partner, responsible for the eDRS-a and eDRS-C satellite payloads.
laser / rF hyBrid relay Payloads
BeneFits oF oPtical communication BeneFits oF relay Payloads
next generation doWnlink suBsystems – PerFormanceTesat has already successfully validated the new gigabit Downlink System concept based on an engineering Model.
Tests were performed including a flight TWTa at 26 gHz for full symbol rate of 500 MBaud as shown in the figure. In order to gain representative end-
to-end performance results, a receiver prototype was used. To ensure repre-sentative test conditions, a noise source was used to simulate the RF link condi-
tions. Measured Bit error performance up to 64-apSK shows very low imple-mentation loss and thus demonstrates efficiency of digital predistortion.
Test setup-up for realistic End-to-End performance evaluation including ground station receiver.
14 15
• High-speed connection with small la-tency from ground to LeO via relay (enhanced forward)
• Power & bandwidth efficient trans-mission on the RF downlink by using advanced coding and high-order modulation schemes
• Optical GEO-GEO interconnection capability. The Next generation
Relay payloads will be equipped with multiple LCTs and sophisticated data processing enabling routing capabilities
• LEO-GEO communication extension with several Ka-Band Inter-Satellite Links to serve LeOs without LCTs
• Security/encryption for dedicated applications
• Future hybrid payloads will directly benefit from any evolution of the LCT
These advanced features will enable enhanced mission tasking and extend the service flexibility and adaptability.
The eDRS-a Relay payload (Fig. 1) includes both an optical/laser and an RF/Ka-Band Inter-Satellite-Link. The payload was fully designed at Tesat. The design activities included also the support for the end-to-end System definition.
The eDRS-a Block Diagram (Fig. 2) shows the extensive functions perfor-med by the Relay payload.
next generation hyBrid relay Payloads edrs success storyFuture generations of Hybrid Relay Satellite payloads may include advanced features like:On January, 29th 2016, the eDRS-a payload hosted on eutelsat 9B was successfully launched and in-orbit test activities
were successfully concluded end of May 2016.
edrs-a Block diagram
16 17
*Activities covered under Small GEO ESA program
rePeaters / Payloadsnext generation hyBrid relay Payloads – concePt
Our aim is to be a solution provider for your success in satellite communi-cation. We cover all aspects and tasks necessary for a successful payload pro-ject from project management, subcon-tractor and supply chain management, payload engineering, layout and inter-face engineering, quality assurance to assembly, integration and test (aIT) as well as in-orbit testing (IOT).
We benefit from lean management structures and short communication links within the company, close collabora-tion with the product lines (amplifier/ Datalink / Laser / passive products and parts agency) and service lines for optimized payload designs. We effi- ciently coordinate the aIT-phases on equipment, subsystem and system level in Backnang and at prime facilities.
Our focus is on small and medium sized Communication payloads inclu-ding Hybrid Optical / RF payloads.additionally, we offer vast experience in implementing new technologies through in-orbit verification (IOV) mis-sions, the design and implementation of hosted payloads to our customers.
Next generation Hybrid Relay payloads will be able to serve multi-ple users and support multihop links together with further relay nodes. This will results in a global coverage of the relay service. Usage of data buffering could enable flexible link adaptation in order to achieve robustness against
atmospheric effects. at the same time, the architecture employing new modu-lation and coding concepts will allow considerably higher data througput.
an advanced Mission Control Con-cept aims at a maximum of overall sys-tem autonomy and increased flexibility
for the end user and for maximum secu-rity for end user data.
Laser Communication Terminal and the majority of the other key elements are Tesat products developed and manufactured on site.
Tesat-Spacecom has been working in the field of Repeater/paylaod programs for more than three decades. The first Re-peater program for Tesat (formerly Telefunken) was the C-Band Repeater for Intelsat IV-F3 at the beginning of the 1970s. Our actual payload programs are Hispasat ag1, eDRS-a / C and the phase a / B payload study for H2SaT.
Next generation Hybrid Relay payload configurations are currently being developed at Tesat.
Rx
Rx
Data ProcessingLCTs
Steerable Antennas
Feeder Antennas
Quantum Key Generation
Flexible Gigabit Modulation
Advanced Mission Control
Enhanced Amplification & Filtering
ISL Transreceiver
Forward Data Receiver & Telecommand Decoder (FDR)
Input Filter & Channelization
18 19
100 kg10
15
20
25
3035
40
200 kg
300 kg
400 kg
500 kg
500 W 600 W 700 W 800 W 900 W 1 kW 2 kW 3 kW 4 kW 5 kW 6 kW
Mass
Power Class
Channels
COMMS MODCS Hispasat ag1 Heinrich HertzSmall S/L-Band payload Communication Satellite plus on-
board processor and direct radiating array antenna
Communication Satellite with in-orbit-verification (IOV) Payload and MIL payload
33 kg Mass 400 kg Mass 420 kg total Mass
174 W payload power 4,000 W payload power 3,500 W total payload power
S-Band Horn RX antennaL-Band Horn TX antenna
• 2 dual reflector Ku-Band TX/RX antennas
• 1 top deck Ku-Band direct radia-ting array antenna
• 1 fixed Ka-Band TX/RX top deck antenna
IOV:• 1 top deck Ka-Band ISL• 2 side deployable Ka-Band
MIL: restricted
L-Band, S-Band Ku-Band, Ka-Band Ku-Band, Ka-Band
Dual channel (one transparent, one for downlink)
24 Ku-Band Channels5 Ka-Band Channels
IOV: 8 channelsMIL: restricted
Payload ranges – mass, PoWer & channelstransParent Payload and rePeater Products
Tesat features extensive heritage and experience with small up to me-dium sized payloads on a variety of platforms and with many different Sa-tellite primes.
This makes Tesat an independent Payload & Equipment Supplier with outstanding know-how regarding cus-tomer requirements.
Tesat is a First Class Hosted payload Supplier for Communication payloads, Hybrid & RF Relay Payloads and IOV payloads.
Tesat has considerable heritage in designing, producing and testing large repeaters and paylaods. We efficiently coordinate and perform
the aIT-phases on equipment level, subsystem and system level in Back-nang and at prime facilities. Beyond that, we offer to our customers vast
experience in implementing new tech-nologies through in-orbit verification missions and the design and imple-mentation of hosted payloads.
Our focus is on customer specific solutions, with priority on small and medium sized communication as well as hosted payloads.Tesat-Spacecom has a uniquely wide product portfolio comprising all types of repeater equipment.
21*Activities covered under Small GEO ESA program
3 assemBly. integration. test.
the Facilities
assemBly. integration. test.
The Integration Hall itself comprises a clean room (cl. 8) area of approxi-mately 500 m2, of which ~250 m2
have a height of ~10 m. The hoist unit in the integration hall is a crane with a load capacity of 2,000 kg SWL and
a height of about 8 m. The air lock di-mensions are 3.7 m x 4.6 m.
For more than 30 years Tesat-Spacecom has been involved in aIT activities on Repeater and payload level starting from the OTS Repeater (Orbital Test Satellite) to SaTCOMBw2 to the current payload programs like Hispasat ag1 and eDRS. The aIT area is fully equipped and staffed to perform complex assembly, integration and test operations on Downlink Subsystems and Repeaters from L-Band to V-Band.
22 23
The EMC-Chamber is a double shiel-ded chamber in line with MIL-STD 461. The dimensions of the eMC-Chamber are 7.4 x 6.0 x 5.0 m (L x W xH) with a door size of 310 x 360 cm (W x H). all standard tests like RS / Re and CS / Ce (Radiated and Conducted Susceptibi-lity / emission) can be performed with our test-equipment.
assemBly. integration. test. assemBly. integration. test.RF Testsystem / EGSE
at Tesat-Spacecom, we have well es-tablished capabilities to design, pro-cure, calibrate, operate and deliver Test-Systems for test activities on Sub-system- and System-Level.
25
Control
FhG-OBP
Next-OBP
26 GHz
TWT
EPC
CAMP
4 x
4 S
witc
h M
odul
e
LNAs
DoCons30/20 GHz
30/20 InputS ecti on
Sw
itch
Mat
rix
Input Filter S ecti on
Canel Filter
A mpli�er section
20/26 G Hz Output Section
UpCons20/26 GHz
TWT
EPC
CAMP
DoCons20/1,6 GHz
UpCons1,6/20 GHz
LNAs DoCons26/20 GHz
26/20 Input S ecti on
Output Filter S ecti on
Control
ISL
GeReLEOSmart
OBP S ecti on
Spot 1
Spot 2
Flex Omux
Flex INET
CFK Reflector
KGEO DoCon
TWT
LCAMP
Dual-EPC
TWT
LCAMP
Dual MPMPower
Combiner
TWTLCAMP
EPC
250W FPM
TWT
LCAMP
Dual-EPC
TWT
LCAMP
Dual Flex MPM
TWTLCAMP
EPC
MPM
Ku-Band Section26 GHz Section + OBP
30/20 GHz Section
TWTLCAMP
EPC
300W FPM
TWTLCAMP
EPC
MPM
4 roadmaP oF Programs
the mission
In the frame of the Flex INeT / ONeT development programs, Tesat is investi-gating flexible payload configurations based on „analogue“ equipment tech-
nologies. Flexible MpMs with adjustable saturated output power are already part of our FM product portfolio. In the run-ning H2SaT payload program (funded
by DLR), an in-orbit-verification of such new technologies (with many innovations from german universities, research insti-tutes and companies) is envisaged.
power and spectrum management are important features to enable operators to reconfigure the payload in order to adapt operational needs over lifetime of the satellite.
Based on heritage – discover the Future
26 27
1977/78OTS2 K-Repeater
1983/88ECS4 K-Repeater
1987/89TV-SAT/TDF4 High Power TX Sections
1989Deutscher Fermeldesatellit (DFS)3 FM Ku-Band and Ka-Band Payloads
MOP/MTP4 FM S-/L-Band Repeater
2001ArtemisReturn Repeater Ka-Band
2006SAR-Lupe5 FM HPAs for Radar Application
2008COSMO-Skymed TXA4 FMs X-Band
2008COMS MODCS1 FM S-/L-Band Payload
2010Astro Terra2 FM X-Band Downlink Subsystems
2010Alphasat1 Ka-Band Downlink Subsystem
H2SAT Phase A StudyKa-Band IOV Payload
2013H2SAT Phase B StudyKa-Band IOV PayloadKu-Band MIL Payload
2015Hispasat AG11 FM Ku- and Ka-Band Payload
2015/16EDRS-A/EDRS-COptical/RF-Payloads
1977/78OTS2 K-Repeater
1983/88ECS4 K-Repeater
1987/89TV-SAT/TDF4 High Power TX Sections
1989Deutscher Fermeldesatellit (DFS)3 FM Ku-Band and Ka-Band Payloads
MOP/MTP4 FM S-/L-Band Repeater
2001ArtemisReturn Repeater Ka-Band
2006SAR-Lupe5 FM HPAs for Radar Application
2008COSMO-Skymed TXA4 FMs X-Band
2008COMS MODCS1 FM S-/L-Band Payload
2010Astro Terra2 FM X-Band Downlink Subsystems
2009SATCOMBw22 FM X-Band Repeater
2009SATCOMBw22 FM X-Band Repeater
2015RadarsatConstellation Mission
2015RadarsatConstellation Mission
2010Alphasat1 Ka-Band Downlink Subsystem
H2SAT Phase A StudyKa-Band IOV Payload
2013H2SAT Phase B StudyKa-Band IOV PayloadKu-Band MIL Payload
2017/2018:MetOp-SG X-Band Downlink & Ka-Band Downlink SubsystemsMeteorological Missions
2017/2018:MetOp-SG X-Band Downlink & Ka-Band Downlink SubsystemsMeteorological Missions
2015OBZOR-OEO-Mission
2015OBZOR-OEO-Mission
2014EGYPT-SAT2EO-Mission
2014EGYPT-SAT2EO-Mission
2015Hispasat AG11 FM Ku- and Ka-Band Payload
2017:Jason-CS X-Band DL SubsystemOcean Altimetry Mission
2017:Jason-CS X-Band DL SubsystemOcean Altimetry Mission
2017:Kompsat-6 X-Band DL SubsystemEO-Mission
2017:Kompsat-6 X-Band DL SubsystemEO-Mission
2015/16EDRS-A/EDRS-COptical/RF-Payloads
1998EnvisatKa-Inter Satellite Link (ISL)X-Downlink Subsystem
1998EnvisatKa-Inter Satellite Link (ISL)X-Downlink Subsystem
road
maP o
F Pro
gram
s
Tesat-Spacecom GmbH & Co. KGgerberstraße 4971522 Backnang
germany+49 7191 930 - 0
© Copyright Tesat-Spacecom GmbH & Co. KG 2016produced in germany, May 2016
all Rights Reserved.