OPTEL-µ : Flight Design and Status of EQM Development

Transcription

1 OPTEL-µ : Flight Design and Status of EQM Development Elisabetta Rugi Grond General Manager OEI Opto AG ICSO-2016, 20 th Oct. 2016

2 Presentation Outline System Overview OPTEL-µ Space Terminal: Block Diagram Flight Design Status of EQM Development In-Orbit Demonstration Outlook 2 OEI Opto AG

3 OPTEL-µ A Small Optical Terminal Optical downlink to increase mission data return Small Sats in LEO Orbit Modular design of space terminal for various satellite providers Developed by RUAG Space under ESA ARTES5.2 / ARTES 3-4 Multiple low-cost ground stations to secure cloud mitigation First Flight Model planned for 2017 Small Space Terminal 8 kg, 8 lt, 43 W 2 Gbps Downlink Rate Ground Terminal 0.6 m Ø telescope Uplink beacon laser Laser Safety Class 1M, based on 1064nm LIDAR technology 3 RUAG Space

4 Use Cases Use Case 1 : Eye-in-the-Sky 1 Use Case 3 : Payload Data Download 2 Use Case 2 : Add-on to RF System Use Case 1 : Profit from high data rates of 2Gbit/s Use Case 2 : Double data volumes with +25% on-board resources Use Case 3 : Site Diversity 4 RUAG Space

5 OPTEL-µ Space Terminal Block Diagram OPTEL-µ ST comprises three units: Benefit of this distributed approach: Facilitate flexible integration on the spacecraft Flexible accommodation Distributed thermal / electrical loads Optimised for use on micro-satellites 5 RUAG Space

6 OPTEL-µ Space Terminal Optical Head Optical Head (OH) comprises: Micro-Pointing Assembly: Point towards the Optical Ground Station, Track the received beacon signal. Optical Bench: Receive beacon signal and relay it onto the acquisition and tracking sensors (AS and TS). Collimate the communications laser and beacon signals (from the Laser Unit), Route the optical signals to / from the µpa, Implement telescope function (beam expander) as part of the OB, OH Electronics: Readout AS and TS, encoder sensors of the µpa and drive the actuators and motors. 6 OEI Opto AG Optical Head with Back Cover Removed (Showing Optical Bench) Optical Head EQM Design

7 OPTEL-µ Space Terminal Laser Unit Laser Unit (LU) comprises: Pulsed Laser Transmitter: PLT provides two individually modulated optical channels each at a data rate of 1.25 Gbps. Two optical channels are at wavelengths of 1545nm and 1565nm. PLT EQM Optical Fibre Amplifier: OFA incorporates two individual optical fibre amplifiers that are optically pumped at 980nm to achieve the required amplification. Three output signals are generated by the OFA two communications signals and the space beacon signal. For each optical channel the output power required from the OFA is 100 mw at end of life. OFA EQM 7 OEI Opto AG

8 OPTEL-µ Space Terminal Electronics Unit Electronics Unit (EU) comprises: Power Conditioning Unit (PCU) : PCU derives from the spacecraft power bus the supply voltages for the operation of the ST. PCU can operate in a low-power mode (where not all functionality is required) and the downlink mode. Terminal Control Unit: Control and operation of the OPTEL-µ ST, Telemetry / telecommand (TM/TC) interface, User data interface to the satellite payload. User data is stored in a Buffer Memory prior to a downlink. RF Modulator: RFM serializes the parallel data stream from the BFM and amplifies the 1.25 Gbps data stream which is then used to modulate the optical signals in the PLT. Electronics Unit EQM Design Electronics Board Configuration 8 OEI Opto AG

9 OPTEL-µ ST EQM Development Status Optical Head: µpa assembly of EQM on-going. Commissioning tests to be held in Nov Optical Bench qualification tests completed. Delivery end Sept Optical Head Electronics manufacture of the OHE EQM electronics on-going. Acquisition Sensor / Tracking Sensor manufacture of the EQM electronics on-going µpa EQM Optical Bench EQM Acquisition Sensor EQM 9 OEI Opto AG OH Electronics EM+

10 OPTEL-µ ST EQM Development Status Laser Unit: Pulsed Laser Transmitter integration completed and performance tests on-going. Optical Fibre Amplifier integration of the OFA EQM on-going. Electronics Unit: Power Conditioning Unit performance tests on-going. Delivery planned for Nov Terminal Control Unit manufacture of the TCU EQM on-going, RF Modulator manufacture of the TCU EQM on-going. OFA EQM PLT EQM 10 OEI Opto AG Electronics Unit EM+

11 In-Orbit Demonstration Opportunity OPTEL-µ EQM as a passenger payload on a LEO Earth observation spacecraft: Not part of / used in main mission. Use platform resources to operate, but mission is independent of OPTEL-µ. Potential to use OPTEL-µ as part of the mission once IOD successfully completed. Current Status: Accommodation of OPTEL-µ space terminal completed. Thermo-mechanical and electrical interfaces consolidated. Manufacturing of OPTEL-µ Structural Model (SM) tests completed. OPTEL-µ Optical Head Optical Head SM 11 OEI Opto AG

12 Outlook EQM development timeline: Environmental Tests = Feb. Apr System Tests = May 2017 Shipment to S/C for IOD = June 2017 IOD timeline: S/C AIT = H Launch = Jan (TBC) IOD in month duration Commercialisation of the OPTEL-µ Product: Discussions on-going with a number of satellite operators / Earth Observation users interested to procure and use OPTEL-µ in their system. 12 OEI Opto AG

13 Acknowledgements Development of the OPTEL-µ optical terminal is being funded jointly by ESA and OEI Opto AG under the ARTES programme. The authors would like to express our gratitude to Paul van Loock and Dr. Zoran Sodnik at ESTEC, together with the Swiss Space Office and national delegations of all subcontractors for their continued support in the execution of this work. In addition, we gratefully acknowledge the contributions and support from our partners and subcontractors involved in the OPTEL-µ development these being: Deimos (UK) for supporting on S/C accommodation and mission scenarios, Gooch & Housego (UK) for the design and development of the Optical Fibre Amplifier, LusoSpace (Portugal) for the design and development of the Pulsed Laser Transmitter, RUAG Space (Finland) for the design and development of the Power Conditioning Unit, SES Techcom (Luxembourg) for supporting on the Optical Ground Station Integration, SSC (Sweden) for Ground Network Analysis, TNO and Nedinsco (The Netherlands) and Meopta (Czech Republic) for the design and development of the Optical Bench. 13 OEI Opto AG