Goals

  • Present status of the first anomaly data analysis
  • Define actions for the next

Date

at 2:45PM

Attendees


Discussion items

ItemNotes

Overview of the anomaly (Milan)

RPW team data analysis report
  • Bias 
  • LFR
  • TDS
  • THR (Analysis was still in progress, but presentation was made by Antonio Vecchio during ROB telecon on Feb. 12, see here)
SOC first analysis (Chris Watson)

The three plots showed by Chris:

  1. Anomaly with respect to SC body rate in Y axis, just to illustrate position within a mosaic pattern and during, or close to, a slew
  2. Anomaly with respect to RPW parameter NIW00119 (current provided by a -5V rail in the bias unit?). Small downward change in the measured current following the anomaly, step probably smaller than the TM quantisation step so not very accurate.
  3. Illustration of similar (but short-lived) downward blips occurring during a WOL. Might be related, might be unrelated.

Conclusions & next steps
  • LESIA (ROC) to take account of anomaly in the RPW operation planning (RPW sub-system will send to Xavier configurations to be applied on-board to mitigate impact of the antenna 3 failure on science and limit possible identified risk)
  • ARB will be planned with SOC/MOC (see action below)
  • RPW will prepare an anomaly report (see action below)
  • RPW sub-system to pursue the data analysis
  • Progress to be discussed at the next ROB telecon on Feb. 12 at 4PM

Action items

Who?What?When?StatusComment

Instrument risk mitigation and short-term operations

RPW sub-system Lead CoIs

Send to Xavier Bonnin the commands to mitigate the impact on-board (when know).

ASAP (at least before next ROB meeting on Feb 12)
For the moment only Bias team has identified a risk and will send commands.
Xavier Bonnin 
Add into RPW Operations User manual to not plan Bias sweeps durint S/C attitude activities (slews)ASAP

Must be applied starting from the next IOR delivery (STP295)

Xavier Bonnin 
Schedule a PA HF ON/OFF power cycleTBD
  • Better if it is done after ARB meeting with MOC
  • SOC must be informed when delivered IOR

Instrument anomaly investigation











Jan Soucek 

Report to Xavier Bonnin any relevant information concerning TDS that can help to understand what on-board happened on November 13, 2023

ASAP

Xavier Bonnin 
Write the anomaly report for RPWBefore ARB

Xavier Bonnin 

See with Moustapha (and Antonio) which data are needed and how read them to analyse PA HF measurementsASAP

Milan Maksimovic 
Plan a discussion with FIELDS team concerning dust impact (carbon fibers) in PSPCan be planned during Joined RPW-FIELDS meeting at Orléans (last week of Feb. 2024)

Instrument science impact
















Xavier Bonnin 


Notify RPW data users about anomaly impact on science data qualityBefore Feb. 13, 2024
  • In CDF, use CAVEAT attribute and Quality flag during periods when antenna 3 is in used after anomaly (Nov. 13, 2023 at 23:30z)
  • Give information on the RPW Web portal at LESIA
  • If it cannot be done on time, we shall suspend temporary the delivery of RPW science data CDF files (L2) to SOAR

LESIA-CNES actions
















Attached items