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No. 112 - Routine Operations

No. 112 - Routine Operations

Report for Period 30 December 2007 to 05 January 2008Routine activities were carried out during the reporting period.

The table below shows a chronology of the main activities in the reporting period:

MET (Day) Date DOY Main Activity
782 30/12/07 364 Routine Operations
783 31/12/07 365 Routine Operations
Ranging measurement not successful
784 01/01/08 001 Routine Operations
785 02/01/08 002 Routine Operations
Ranging measurement not successful
786 03/01/08 003 Routine Operations
787 04/01/08 004 Routine Operations
788 05/01/08 005 Routine operations

At the end of the last Cebreros pass in the reporting period (DOY 005, 12:00z) Venus Express was orbiting Venus at 176.5 million km from the Earth. The one-way signal travel time was 588 seconds.

Payload Activities

ASPERA
The instrument was regularly operated as part of the routine plan.

MAG
The instrument was regularly operated as part of the routine plan.

PFS
The instrument was not operated during the reporting period.

SPICAV
The instrument was regularly operated as part of the routine plan.

VeRA
No RSI activities took place this week.

VIRTIS
The instrument was regularly operated as part of the routine plan.

VMC
The instrument was regularly operated as part of the routine plan.

Ground Facilities

New Norcia support of radio science
NNO was used in two occasions for Radio Science dual ranging. The activity failed on both occasions on 31 December 2007 & 2 January 2008. The reason is understood to be due to the signal drop observed in the S-band link.

The current ranging standard does not permit different integration times for different bands. The problem is the relatively high signal-to-noise ratio in X-band with respect to S-band making it challenging to optimise integration time. This needs to be short enough to avoid saturation in X-band and long enough to allow tone lock in S-band. Test passes to fine-tune these settings have been proposed.

Future Milestones

  • NNO and Cebreros scheduling for 2008

Last Update: 1 September 2019
30-Nov-2021 19:11 UT

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