1. LYRA on PROBA2 and other PMOD/WRC irradiance experiments
SCSL SWAP/LYRA workshop
ISSI, Bern June 2006
LYRA on PROBA2 and other PMOD/WRC irradiance experiments
Werner Schmutz, PMOD/WRC, Switzerland

2. Overview Schedule Total Solar Irradiance
Introduction to the PMOD/WRC LYRA science aim: Application to Space Weather:
Nowcast and short-term forecast of ozone in the middle atmosphere

3. Future PMOD/WRC Irradiance Measurements (approved and financed)
C. Fröhlich et al. SOVIM/ISS
2008(?)
J.-F. Hochedez et al. LYRA/PROBA2
W. Schmutz et al. PREMOS/PICARD
2008/

4. PMOD/WRC space experiments
SoHO operations extended to end of 2009
today

5. Space experiments are built in house at PMOD/WRC

6. Total Solar Irradiance measurements
present :
VIRGO on SoHO (since 1996)
ACRIM III on ACRIM-sat (since 2000)
TIM on SORCE (since 2003)
ERBE on ERBS (since 1984)
future:
SOVIM (CH/B experiments on ISS 2006)
PREMOS-TSI (CH experiment on PICARD 2008)
SOVAP (B experiment on PICARD 2008)

7. VIRGO/SoHO: Operational since 1996
Time series of the total solar irradiance and in selected wavelength bands (red green, and blue): 1-minute sampling
Image of the Sun in the green light in low resolution (12 pixels): 1 minute sampling
DIARAD
PMO6
SPM
LOI
SoHO launch 2. December 1995
VIRGO instruments

8. Absolutely calibrated TSI measurements
TIM/SORCE
2003 -

9. TSI – latest update

10. PMOD composite of the Total Solar Irradiance
the aim is to get experimental long-term information about the TSI

11. Total Solar Irradiance observations between 2006 and 2012
ACRIM III ?
VIRGO/SOHO ?
TIM/SORCE 2003 – (?)
SOVIM/ISS – ?
PREMOS-TSI/PICARD 2008 – 2011
SOVAP/PICARD
(SDO has no TSI instrument)
NPOESS
National Polar Orbiting Operational Environmental Satellite System may have TSI instrument – but are planned to start not earlier than 2009 (?), more likely as late as 2012

12. Total Solar Irradiance observations between 2006 and 2012
ACRIM III ?
VIRGO/SOHO ?
TIM/SORCE 2003 – (?)
SOVIM/ISS – ?
PREMOS-TSI/PICARD 2008 – 2011
SOVAP/PICARD
(SDO has no TSI instrument)
NPOESS
National Polar Orbiting Operational Environmental Satellite System may have TSI instrument – but are planned to start not earlier than 2009 (?), more likely as late as 2012
TSI on NPOESS canceled June 2006

13. SOVIM intended for the ISS (launch 2008
SOVIM intended for the ISS (launch 2008?): Hardware, tests and calibration finished aceptance review passed (almost)

14. PICARD (PI G. Thuillier) PREMOS – SOVAP – SODISM
Filter Radiometers
Total Solar Irradiance

15. LYRA (Status: FM April 2005)

16. LYRA (Status: FM March 2006)
BESSY synchrotron calibration at PTB

17. Filter Radiometers: LYRA/PROBA2 (launch 2007) PREMOS-PFR/PICARD (launch 2008)
LYRA: 7-20, 20-70, 125, 215 nm
PREMOS: 215, 268, 535, 782 nm

18. Rozanov et al. 2001: what UV-wavelength should be observed?
Ozone mixing ratio changes (%) due to a 10% increase of the spectral solar flux in 1 wavelength bin (1 nm).

19. PMOD/WRC contribution to COST 724 LYRA Instrument on PROBA2
The project idea:
To evaluate the response of the middle atmosphere
to the solar UV irradiance variability
LYRA
Instrument
on PROBA2
Statistical tools
for nowcast and
short-term forecast
of the solar irradiance
(e.g. SOLAR2000)
On-line LYRA data
for space-weather
community
Other observations
of solar irradiance
Chemistry ionosphere
climate model
(CICM)
extension of SOCOL
(Egorova et al.,2005)
Nowcast and short-term forecast
of the neutral and ionic composition
of the
middle atmosphere

20.  See presentation of Tanja Egorova
Study of the middle atmosphere response
to the short-term solar irradiance variability
COST 724 & SNF project
 See presentation of Tanja Egorova

21. Summary
SWAP (0.1 Hz) + LYRA (60 Hz) on PROBA2 provide the EUV equivalent in Europe of the NOAA SXI + GOES X-ray monitor
SODISM + PREMOS on PICARD will continue in the near UV and visual 2008/
Equivalent or rather complementary
Technology demonstration for solar orbiter