Oxford MIPAS meeting#119
05 Jun 07

Present

Instrument Status [Prev] [Next]
MIPAS currently in passive decontamination - due to be switched back on on 6th June and commence MA/NOM mode observations.

L1B Data (JH) [Prev] [Next]
L1B coverage maps updated to May 22nd
May mostly consisted of new 10-day 60% duty cycle mixing NOM and MA modes.

Anomalous Scanning (AD) [Prev] [Next]
From 3-11 April MIPAS seems to have been operating in an unrecognised scan pattern consisting of 22 scans from 101-37 km @ 6km intervals, with two successive sweeps (forward & reverse) at each tangent altitude.
Marta de Laurentis (ESRIN) has replied (23May07):
I see in the macrocommand scheduling sent by ESOC that there are some inconsistencies in the upload of the azimuth and elevation tables; they started the NOM mode in orbit #26610 using tables already on-board (i.e. related to the MA mode commanded before).
An anomaly report has been opened on the ESOC (operations) system.

ESA L2 Data (JW) [Prev] [Next]
Comparing ESA monthly means of N2O and NOy species (N2O, NO2, HNO3) to see if RR data are consistent with what was observed with FR data.
Results will be presented at next week's QWG meeting.

Cloud Detection (JH) [Prev] [Next]
Trying Singular Vector Decomposition as an alternative method of Cloud detection

Mesospheric Retrievals (LMV) [Prev] [Next]
Trying a linear least-squares fit retrieval for pT, O3 and H2O using entire MIPAS bands (screening out lines affected by non-LTE effects and contaminant gases).

MIPAS/TES Retrievals (CW) [Prev] [Next]
Aim is to combine MIPAS limb measurements of stratospheric O3 with TES nadir-viewing measurements to obtain more information on tropospheric O3 profile (basically how TES was supposed to work before their problems with limb-views)

Oxford L2 Processing (AD) [Prev] [Prev]
Running MORSE retrieval to process L1B data for selected days throughout the full and reduced resolution dataset.
pT, H2O, O3, HNO3, CH4, N2O, NO2, CFC-11, CFC-12, ClONO2, N2O5 and CO (LTE assumption).

ACPD Papers [Prev] [Next]
Papers selected from the ACPD website for discussion
"First direct observation of the atmospheric CO2 year-to-year increase from space"
M. Buchwitz et al. (published 16.05.2007, open until 11.07.2007)
Introduced by CW.
"Geophysical validation of temperature retrieved by the ESA processor from MIPAS/ENVISAT atmospheric limb-emission measurements"
M. Ridolfi et al. (published 25.04.2007, open until 20.06.2007)
Comments being collected by LMV.
"Vertical profiles of lightning-produced NO2 enhancements in the upper troposphere observed by OSIRIS"
C. Sioris et al. (published 11.04.2007, open until 06.06.2007)
Comments being collected by JW.
Other papers with 'MIPAS' in the title in the Open Discussion phase, which may be adopted at a future meeting
"Geophysical validation of MIPAS-ENVISAT operational ozone data"
U. Cortesi et al. (published 07.05.2007, open until 02.07.2007)
"Validation of MIPAS HNO3 operational data"
D. Y. Wang et al. (published 17.04.2007, open until 12.06.2007)