Commissioning KP 0ESAC December Michele Zundo ESA/ESTEC EOP-PEP SMOS KP 0 09-Dec-2008 SMOS SODAP Status

Commissioning KP 0ESAC December 2009 Presentation Summary SODAP Scope SODAP Tasks SODAP Team SODAP Timeline SODAP Procedures SODAP Execution: –SODAP Week 0 –SODAP Week 1, 2 SODAP Outcome SODAP Observation Conclusion and Recommendations 2

Commissioning KP 0ESAC December 2009 SODAP Scope 3 Switch On and Data Acquisition Phase Lesson learnt. Insure before instrument commissioning starts the following: 1.Basic Instrument Health check 2.Verification Space to Ground Links XB 3.End to End functional data flow verification 4.Communication Scenario Verification 5.Opportunistic feed to processor and DPGS PLM-Health Check + SODAP-RF

Commissioning KP 0ESAC December 2009 SODAP Tasks 4 For both ESAC and SVALSAT : Check RF-links and budget Verify XB masks and behaviour at high low elevation and identify operational constraints. Confirm correctness timing of station and PLM XB scheduling Exercise the different scenarios foreseen in Communication Baseline Doc Exercise autonomous downlink and OBSW reset Verify Data delivery to DPGS

Commissioning KP 0ESAC December 2009 SODAP Team(1) 5

Commissioning KP 0ESAC December 2009 SODAP Team(2) 6 + Insa DPGS Operation Team at ESAC

Commissioning KP 0ESAC December 2009 SODAP Timeline (1) 7

Commissioning KP 0ESAC December 2009 SODAP Timeline (2) 8

Commissioning KP 0ESAC December 2009 SODAP Procedures (1) 9 Described in: Plan for RF activities during SMOS SODAP SO-PL-ESA-GS-6515 SMOS SODAP-RF Procedure Issue 0 Draft 2 SO-GS-ESA-TP-6623

Commissioning KP 0ESAC December 2009 SODAP Procedures (2) 10 ESAC

Commissioning KP 0ESAC December 2009 SODAP Procedures (3) 11 SVALSAT

Commissioning KP 0ESAC December SODAP Week 0

Commissioning KP 0ESAC December 2009 PLM-Health Check Also known as Pre-SODAP Implemented week 0 following switch-on All OK. See Presentation by FOS 13

Commissioning KP 0ESAC December SODAP Week 1-2 RF and scenarios

Commissioning KP 0ESAC December 2009 Preliminary outcome ESAC (0) 15

Commissioning KP 0ESAC December 2009 Preliminary outcome ESAC (1) 16

Commissioning KP 0ESAC December 2009 Preliminary outcome SVAL (2) 17

Commissioning KP 0ESAC December 2009 Preliminary outcome (3) 18

Commissioning KP 0ESAC December 2009 Preliminary outcome (4) 19

Commissioning KP 0ESAC December 2009 Preliminary outcome (5) 20

Commissioning KP 0ESAC December 2009 Preliminary outcome (6) 21 All 27 tests executed. More than 50 Gbyte data acquired and analysed. 135 XB passes have been scheduled Functional chain OK (timing, dependency on elevation) i.e. no operational constraint identified. Timing setting tuned at LOS Different setting of stuffing data with good results (TBC) SVAL XB tracking using SB for initial lock tested

Commissioning KP 0ESAC December 2009 Preliminary outcome (7) 22 ESAC links budgets and behavior at different elevation

Commissioning KP 0ESAC December 2009 Preliminary outcome (8) 23 SVALSAT RF links budgets and behavior at different elevations

Commissioning KP 0ESAC December 2009 Preliminary outcome (9) 24 SVALSAT Conclusion The Eb/No observed is between 15 and 20 dB over all passes taken. This shows that there is a large system margin. At 15 dB Eb/No the IF input level is -40 dBm and the antenna tracking receiver SNR is about 17.5 dB. The threshold SNR for antenna autotrack is 10 dB. This means that there is a system margin of 7.5 dB.

Commissioning KP 0ESAC December 2009 Preliminary outcome (10) 25 Data continuity checked, major problems observed since data is lost on-board on MM partition 3

Commissioning KP 0ESAC December 2009 Observations working list(1) 26 Informal working list of observations to be changed to formal at subsystem level OBS/AR/NC/SPR if/as needed. List will be cleaned up at end of SODAP Major issues from SODAP point of view are: Missing Packet detected (problem with on-board MM writing) (see presentation from FOS) Duplicated/lost XB_DOWNLINK to SVALSAT Occasional crashes of DAS acquisition Inconsistent performance of E2E WAN transfer

Commissioning KP 0ESAC December 2009 Observations working list(2) 27

Commissioning KP 0ESAC December 2009 Preliminary Conclusions 28 The System can deliver XB data to support IOCP Both ESAC and SVAL scenario feasible

Commissioning KP 0ESAC December 2009 Recommendations 29 1.Initiate IOCP with NRT Communication scenario 2 orbit overlap 2.Address problem in acq. part of DAS to make it robust or consider alternate procurement. 3.Initiate implementation of OBSW modifications to cope with MM write error and partition disabling issues 4.Complete performance evaluation of NRT WAN link. 5.Decouple XB station commanding from data dissemination (both Short and long term)

Commissioning KP 0ESAC December 2009 Thanks 30 Thanks to the all Team for hard work and long hours