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Requirements to WSO Ground Segment

Requirements to WSO Ground Segment. Lavochkin Association & ROSCOSMOS 30 /0 6 /2006. UV mission structure. SS. GSm. SC + SI. GSt + MOC + SOC. Requirements to GSm (to SS). Requirements from SI Requirements from SC. Requirements from SI. Production of science data per day – xxxx MB

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Requirements to WSO Ground Segment

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  1. Requirements to WSO Ground Segment Lavochkin Association & ROSCOSMOS 30/06/2006

  2. UV mission structure SS GSm SC + SI GSt + MOC + SOC

  3. Requirements to GSm (to SS) • Requirements from SI • Requirements from SC Requirements from SI • Production of science data per day – xxxx MB • Max gap between data production and download • Modes of observation implementation Requirements from SC • HK data production per day – xxxx Kbytes • Frequency and duration of uplink and downlink sessions

  4. To meet the requirements it is necessary: • To determine bit rate for downlink (P) • To determine duration of telemetry downlink per day (T) V = P x T P depends on: SC-E distance, SC-TRS power, SC-antennas,... T depends on: SC zones of vsb, available GSts,.. 12 hrs x 4Mbit/s = 20 GBytes

  5. WSO: Ground station layer Ø High data rate downlink 1.5 Mbps (4 Mbps) Ø 15 m antenna in X-band (12 m) Ø Ground stations under consideration Ø Argentina (Falda del Carmen) Ø P.R. China (Miyun) Ø Russia (Moscow TBC) Ø South Africa (Sat. Appl. Centre, CSIR) Ø Spain (Villafranca, ESA).

  6. WSO: Control center layer • Ø Control centers • Ø Co-located with ground stations • Ø Execute command timelines (uplink support) • Level 1 processing of telemetry (downlink support) • Ø Mission Operation Center (MOC) • Ø Responsible for mission safety and security • Ø Mission planning facility • Ø Mission analysis facility • Ø Flight dynamics facility • Ø On-board software maintenance • Ø Mission data archive • Ø Control centre capabilities.

  7. WSO: Ground Segment

  8. WSO: Operations concept Ø Science operations on spacecraft orbiting in L2 Ø All observations are pre-planned. Science plan, driven by the TAC, as: Ø long term – 6-12 months cycle Ø medium – 28 days cycle Ø short term – 7 days revision Ø Timeline interruption: 6 hours upon SOC request Ø SOC prepares the long term plan Period of SC–Earth Communication per day – 12-24 hrs

  9. Main and backup MOCs • Main MOC will be under responsibility of SC-producer • Backup MOC functionality is equal to functionality of main MOC • Main and backup MOCs have equal access to SC control data

  10. MOC implementation • Get SS requirements • Get SC initial data • Determination of types and formats of files circulating between MOC and SC, GSt, SOC • Development of MOC technical design • Production of MOC • MOC testing with real SC

  11. Cooperation in Ground Segment implementation (Russian interests) • Operation of Ground Stations with different locations • First time Russian SC can be supported by international Ground stations network • Operation of main and back up MOCs from different countries. Transition of control • Support in mission operation standards and relevant software development

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