lyra on-board proba2
DESCRIPTION
LYRA on-board PROBA2. in-orbit operations and achievements. M. Dominique, J.-F. Hochedez et al. PROBA2 Workshop ESTEC, 2010/06/22. Routine activities. Nominal acquisition: Unit2 Integration time = 50 ms Calibration Dark current LED signal Back-up acquisition - PowerPoint PPT PresentationTRANSCRIPT
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LYRA on-board PROBA2
in-orbit operations and achievements
M. Dominique, J.-F. Hochedez et al.PROBA2 Workshop ESTEC, 2010/06/22
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Routine activities
Nominal acquisition: Unit2 Integration time = 50 ms
Calibration Dark current LED signal
Back-up acquisition Acquisition with units1 and 3
Flat-field analysis Off-pointing sequence
Bake out - decontamination Switch on of heaters
(temperature reaches 50°C)
Nominal
Weekly
Monthly
Monthly
Once every 6 months
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Nominal acquisition
Parameters of the mode
IT 50 ms
Unit(s) Unit 2
LED No
Remark IT up to 10ms have been tested
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Flares
Lyra senses flares down to B1.5 at leastLYRA list of flares is in agreement with the
one of GOESAlways visible in the two XUV-EUV
channelsSome strong and impulsive flares are also
visible in Lyman-alpha, which can then be used as a precursor
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Flares
M2.0 flare 2010/02/08 – 22h33
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Calibration sequence
More than one orbit needed to MSM detectors to reach stabilization. No significant difference between the LED signal at the beginning of
the mission and the current one
→ the degradation is affecting the filters and not the detectors
Dark current
Dark current
VIS LED UV LED UV LED VIS LED
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Back-up acquisition
UNIT 2 UNIT 1
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Back-up acquisition
UNIT 2 UNIT 3
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Flat-field paving
Paving step : 0.3° The Hz channel signal doesn’t fit the modeled behavior based on pre-launch flat-field measurements
slight imprinted degradation ???
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Bake-out
AB + CD heaters on for 24h Temperature increase of 10°
No significant effect on the data
Next attempt: July 01
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Specific campaigns
Occultations Sun-Moon eclipses
Stray light analysis
SDO/EVE cross-calibration
campaign
Every orbit till MarchJanuary 15 (annular from LYRA)
July 11 (partial from LYRA)
March 18-19(still under analysis)
May 3(still under analysis)
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Occultations
Ly alphaHzAlZr
Attitude change
Lyman alpha completely absorbed
Contribution of longer wavelengths
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Sun-Moon eclipse
Disappearance and appearance of the active region behind the lunar disk
Attitude change
Occultation
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EVE aging effects are tracked by flying the same instruments on-board a rocket 1x/year LYRA cross-calibration campaign was scheduled during the first rocket flight
Cross-calibration with SDO/EVE
200 220
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LYRA on-board PROBA2
ANNEXES
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Auroral Oval
Perturbations appearing around 75° latitude
2-3 days after a CME, flare ...
Associated to geomagnetic perturbations
Only in Al and Zr
Spacecraft maneuvers
SAA
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And a fifth channel at 17.4nm...
... called SWAP!
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LY-TMR:
State of the data processing pipeline
LY-EDG
LY-BSDG
Telemetry packets
Raw data (in counts)
Lv1: Engineering data (in Hz)
fitsfits
fits
fits
Lv2: Calibrated data (in W/m²)
Other tools Higher level data products
Current state In the future
Not distributed Not distributed
Daily basis After each contact
Not available After each contact
Plots + flare list availableirregular
systematic