Communication Systems Facts - Products - Applications

Transcription

1 Communication Systems Facts - Products - Applications

2 High technology for the global satellite market Over the course of five decades, Tesat-Spacecom has developed in-depth expertise in manufacturing of payload equipment 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 telecommunication via satellite. To date, more than 700 space projects have been completed. The accumulated in-orbit lifetime heritage exceeds 250 million hours. 1. The Benefits page 4 2. The Products page 6 3. The Facilities page 20 Our product offerings encompass highly reliable equipment as for example the travelling wave tube amplifiers, multiplexers, waveguide switches, and modulators, which along with complete systems are delivered to all leading satellite manufacturers worldwide. Therefore, we offer the complete communication technology necessary to disseminate television signals via satellite to each household on ground. More than half of all communication satellites The World of Tesat-Spacecom in orbit operate with Tesat equipment on board. The future global communication infrastructure has to support security-related real time applications with ubiquitous coverage. This will only be viable with most advanced communication systems operating in space. Tesat has successfully developed the key element for this space infrastructure, the optical broadband Laser Communication Terminal (LCT). Using lasers, such terminals can transmit data and imagery between satellites and from satellites to ground at unprecedented 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 satellitebased systems operated by several governments worldwide for security and defense related applications. 4. The Mission page Amplifier Products Passive Microwave Products Communication Systems Datalink Products Laser Products Parts Agency

3 Why use Tesat s Communication Payloads? 1Tesat A One-Stop-Shop The Benefit 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. Starting point is the transformation of mission or Payload requirements into subsystem and equipment specifications as well as design and layout optimization with respect to performance, 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 including Hybrid Optical/RF Relay payloads, making Tesat a predestinated hosted Payload supplier. Our customers benefit from: Our comprehensive product portfolio and equipment know-how Our extensive expertise with regard to system engineering, design, analysis, 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 engineering and design tools covering electrical, mechanical, thermal and radiation aspects. Payload LAYOUT Includes reflector antennas and direct radiating array antenna. *Activities covered under Small GEO ESA program 5

4 Product Scope The 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. Repeaters & Payloads Downlink Subsystems The Products for Telecommunication, all frequency ranges for EO / Science X- / Ka-Band QPSK / 8-PSK Next Generation: 16/32/64-APSK Downlink Subsystems - Repeaters & Payloads *Activities covered under Small GEO ESA program 7

5 Earth Observation (EO) Satellite Downlinks Data Downlink Subsystems 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. Communication Systems of Tesat offers a variety of Data Downlink Subsystems to satisfy these requirements. The below picture illustrates the two basic principles for data transmission from LEO to ground: Typical contact times: LEO - GS: 10 min LEO - GEO - GS: 45 min Direct data transmission between the LEO satellite and the ground station in X-Band or Ka-Band Data transmission via data relay satellites based on RF or Optical Inter- Satellite-Links (ISL) between LEO LEO Earth Observation Satellite and GEO and transmission of data from GEO to LEO in Ka-Band (multichannel configuration possible for higher data rates). Tesat features a long and very successful heritage for Downlink Subsystems since more than 20 years starting with Envisat. Based on cutting-edge technology, we provide Downlink Subsystem concepts to fulfill the growing data rate requirements. Tesat is a one-stop-shop that includes all engineering services (RF, layout, interfaces, reliability), procurement, project management, subsystem assembly, integration and test in Backnang. 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 ( GHz) with QPSK modulation. The products are designed for LEO as well as GEO applications with a lifetime of up to 15 years. Antenna Filter Switch Amplifier Groundstation (GS) Modulator GEO Data Relay Satellite LEO Earth Observation Satellite 8 9 Tesat Products Procurable Products Mass Memory Instrument (Camera, Sensor) Mass Memory

6 X-Band / Ka-Band Downlink Subsystems 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): Next Generation Downlink Subsystems-Concept 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: Modulation Scheme Coding Scheme Band Max. 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 High flexibility in order to cope with changing needs respecting data rates and link conditions Digital predistortion for linearization based on post-a 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 16-APSK QPSK Hardkeyed None Ka 600 Available 32-APSK SCCC, r=0.82 Ka 2,000 under development, available 2017 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. 8-PSK X-Band & Ka-Band Downlink Subsystems in Tesat s AIT Area Data Flow Ctrl Data Flow Ctrl Data Flow Ctrl Modulator 1, hot Data Gigabit Modulator RTR Modulator 3, cold Data Gigabit Modulator RTR Modulator 2, hot Data Gigabit Modulator RTR A1 Att A3 Att A2 Att A 1 hot Optional Feedback Loop A 3 cold Optional Feedback Loop A 2 hot Optional Feedback Loop ISOL1 ISOL3 ISOL2 f1 WGS 1 WGS 3 f2 WGS 2 Bandpass Bandpass Lowpass Lowpass LHCP TX Feed S yste m RHCP TX Data Downlink Subsystem architecture with two active channels and dual polarization antenna Bandwidth effeciency QPSK

7 Next Generation Downlink Subsystems Performance Tesat has already successfully validated the new Gigabit Downlink System concept based on an Engineering Model. Laser / RF Hybrid Relay Payloads LEO Optical Link up to 1,8 Gbit/sec Tests were performed including a flight A at 26 GHz for full symbol rate of 500 MBaud as shown in the figure. In order to gain representative endto-end performance results, a receiver prototype was used. To ensure representative test conditions, a noise source was used to simulate the RF link conditions. Measured Bit Error Performance up to 64-apSK shows very low implementation loss and thus demonstrates efficiency of digital predistortion. The capability to combine laser communication (between LEO and GEO satellites) 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. GEO *+ Benefits of Optical Communication 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 Benefits of Relay Payloads Beam hopping to serve a fleet of LEOs Near real time data transmission during LEO-GEO sightline Significant enlarged time-window for data transmission GEO Interface Unit Digital processing, coding (optional encryption) Modulators High Power Amplifiers LEO GS direct transmission LEO GEO GS via relay transmission GEO Multiplexers Laser beam LEO 1.2 EARTH Transmission Time 1 Orbit Duration EARTH LEO Ka-Band RF Link Groundstation (GS) Test setup-up for realistic End-to-End performance evaluation including ground station receiver

8 EDRS Success Story 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 Next Generation Hybrid Relay Payloads Future generations of Hybrid Relay Satellite payloads may include advanced features like: 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 performed by the Relay Payload. High-speed connection with small latency from ground to LEO via relay (enhanced forward) Power & bandwidth efficient transmission 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. EDRS-A Block Diagram 14 15

9 Next Generation Hybrid Relay Payloads Concept Next generation Hybrid Relay Payload configurations are currently being developed at Tesat. Repeaters / Payloads Tesat-Spacecom has been working in the field of Repeater/Paylaod programs for more than three decades. The first Repeater 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 payloads will be able to serve multiple 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 LCTs Data Processing atmospheric effects. At the same time, the architecture employing new modulation and coding concepts will allow considerably higher data througput. An Advanced Mission Control Concept aims at a maximum of overall system autonomy and increased flexibility Flexible Gigabit Modulation for the end user and for maximum security for end user data. Laser Communication Terminal and the majority of the other key elements are Tesat products developed and manufactured on site. Enhanced Amplification & Filtering Feeder Antennas Our aim is to be a solution provider for your success in satellite communication. We cover all aspects and tasks necessary for a successful Payload project from project management, subcontractor and supply chain management, payload engineering, layout and interface 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 collaboration with the product lines (Amplifier/ Datalink / Laser / Passive Products and Parts Agency) and service lines for optimized Payload designs. We efficiently 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 including Hybrid Optical / RF Payloads. Additionally, we offer vast experience in implementing new technologies through in-orbit verification (IOV) missions, the design and implementation of hosted Payloads to our customers. *Activities covered under Small GEO ESA program Quantum Key Generation Advanced Mission Control Steerable Antennas Forward Data Receiver & Telecommand Decoder (FDR) Input Filter & Channelization ISL Transreceiver Rx Rx 16 17

10 Transparent Payload and Repeater Products Tesat-Spacecom has a uniquely wide product portfolio comprising all types of repeater equipment. Payload Ranges Mass, Power & Channels Our focus is on customer specific solutions, with priority on small and medium sized communication as well as hosted 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 Backnang and at prime facilities. Beyond that, we offer to our customers vast experience in implementing new technologies through in-orbit verification missions and the design and implementation of hosted Payloads. Tesat features extensive heritage and experience with small up to medium sized Payloads on a variety of platforms and with many different Satellite Primes. This makes Tesat an independent Payload & Equipment Supplier with outstanding know-how regarding customer requirements. Tesat is a First Class Hosted Payload Supplier for Communication Payloads, Hybrid & RF Relay Payloads and IOV Payloads. Mass 500 kg COMMS MODCS Hispasat AG1 Heinrich Hertz Small S/L-Band Payload Communication Satellite plus onboard processor and direct radiating array antenna 33 kg Mass 400 kg Mass 420 kg total Mass Communication Satellite with in-orbitverification (IOV) Payload and MIL Payload 174 W Payload Power 4,000 W Payload Power 3,500 W total Payload Power S-Band Horn RX Antenna L-Band Horn TX Antenna 2 dual reflector Ku-Band TX/RX antennas 1 top deck Ku-Band direct radiating 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 Channels 5 Ka-Band Channels IOV: 8 channels MIL: restricted kg 300 kg 200 kg 100 kg Channels 500 W 600 W 700 W 800 W 900 W 1 kw 2 kw 3 kw 4 kw 5 kw 6 kw Power Class

11 Assembly. Integration. Test. 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. The Integration Hall itself comprises a clean room (cl. 8) area of approximately 500 m 2, of which ~250 m 2 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 dimensions are 3.7 m x 4.6 m. The Facilities Assembly. Integration. Test. *Activities covered under Small GEO ESA program 21

12 Assembly. Integration. Test. Assembly. Integration. Test. The EMC-Chamber is a double shielded 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 Susceptibility / Emission) can be performed with our test-equipment. RF Testsystem / EGSE At Tesat-Spacecom, we have well established capabilities to design, procure, calibrate, operate and deliver Test-Systems for test activities on Subsystem- and System-Level

13 Based on heritage discover the future 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. In the frame of the Flex INET / ONET development programs, Tesat is investigating flexible Payload configurations based on analogue equipment technologies. Flexible MPMs with adjustable saturated output power are already part of our FM product portfolio. In the running H2SAT Payload Program (funded by DLR), an in-orbit-verification of such new technologies (with many innovations from German universities, research institutes and companies) is envisaged. The Mission CFK Reflector 30/20 Input S ecti on Input Filter S ecti on Amplifier section LCAMP LCAMP Dual- Dual Flex MPM Output Filter S ecti on Flex Omux Roadmap of Programs Spot 2 KGEO DoCon S witch Ma trix Flex INET 4 x 4 Switch Module Control MPM LCAMP 250W FPM LCAMP Control LNAs DoCons 30/20 GHz LCAMP Spot 1 Canel Filter Dual- LCAMP Dual MPM Power Combiner 30/20 GHz Section OBP Section GeReLEO Smart 26/20 Input S ecti on FhG-OBP 20/26 GHz Output Section CAMP 26 GHz 300W FPM LCAMP CAMP LNAs DoCons 26/20 GHz UpCons 1,6/20 GHz Next-OBP DoCons 20/1,6 GHz UpCons 20/26 GHz MPM ISL LCAMP 26 GHz Section + OBP Ku-Band Section 25

14 1977/ /89 OTS TV-SAT/TDF 2 K-Repeater 4 High Power TX Sections 2001 Artemis Return Repeater Ka-Band roadmap of programs 2006 SAR-Lupe 5 FM HPAs for Radar Application /88 ECS 4 K-Repeater 1998 Envisat Ka-Inter Satellite Link (ISL) X-Downlink Subsystem 1989 Deutscher Fermeldesatellit (DFS) 3 FM Ku-Band and Ka-Band Payloads MOP/MTP 4 FM S-/L-Band Repeater 2013 H2SAT Phase B Study Ka-Band IOV Payload Ku-Band MIL Payload 2008 COMS MODCS 1 FM S-/L-Band Payload 2010 Astro Terra 2 FM X-Band Downlink Subsystems 2009 SATCOMBw2 2 FM X-Band Repeater 2008 COSMO-Skymed TXA 4 FMs X-Band 2014 EGYPT-SAT2 EO-Mission 2015 OBZOR-O EO-Mission 2017/2018: MetOp-SG X-Band Downlink & Ka-Band Downlink Subsystems Meteorological Missions 2015 Hispasat AG1 1 FM Ku- and Ka-Band Payload 2017: Jason-CS X-Band DL Subsystem Ocean Altimetry Mission 2015/16 EDRS-A/EDRS-C Optical/RF-Payloads 2017: Kompsat-6 X-Band DL Subsystem EO-Mission Radarsat Alphasat 1 Ka-Band Downlink Subsystem Constellation Mission H2SAT Phase A Study Ka-Band IOV Payload 27

15 Tesat-Spacecom GmbH & Co. KG Gerberstraße Backnang Germany Copyright Tesat-Spacecom GmbH & Co. KG 2016 Produced in Germany, May 2016 All Rights Reserved.