Oxford MIPAS meeting#56
08 Jun 04

Present

Oxford: Alastair Burgess, Anu Dudhia, Don Grainger, Gareth Thomas, Analia Quijano

Instrument Status [Prev] [Next]

Some details on the Envisat Web-Site including Instrument Availability web-site

Unavailable since 26th March due to mechanical problems.
Update from Rob Koopman.

L2 OFL Data (AQ) [Prev] [Next]

In /home/crun/mipas/L2/2PODPA/ [Plots of profile locations]

L2 OFL (off-line) data continues to be processed, most recently for Jan/Feb 2003.
Software version 4.61 in use since 17 Mar 2004

Residual Spectra (AD/AQ) [Prev] [Next]

Averaged microwindow residual spectra for March 2004 for the nominal microwindows have now been plotted (but not yet examined in any detail): http://www.atm.ox.ac.uk/group/mipas/res/

Reduced Resolution (AD) [Prev] [Next]

A decision has been made that when MIPAS is reactivated the L1B spectra will be at a spacing of 0.0625cm^-1 (ie 16 points per wavenumber, as opposed to the origina 0.025cm^-1, 40 points per wavenumber).

Work has now started on the microwindow selection for this grid.

MORSE (AD) [Prev] [Next]

MORSE is intended to be the replacement to OPTIMO as the Oxford retrieval code

Bugs in pT retrieval now seem to be fixed and, using the AMIL2DA Blind Test#2 case, MORSE seems to achieve similar accuracy with the temperature retrieval to OPTIMO and improved pressure/pointing: [Plot].

SO2 (AB) [Prev] [Next]

Attempting to retrieve SO2 over volcano Nyiragongo (Central Africa), where TOMS showed enhancement during May 2003.

First results look inconclusive - no obvious enhancement in SO2 over volcano compared to 5 deg S

OCS (AB) [Prev] [Next]

Investigating cause of ring of depleted OCS around S.Polar vortex

Eliminated retrieval effects due to vertical correlation O3 variability.

Continuum (GT) [Prev] [Next]

Extracting continuum spectra from MIPAS L2 data to investigate aerosol signatures in atmospheric continuum.

Currently still working on code to extract spectra, assign wavelengths and convert units to km^-1

Email from Rob Koopman (ESRIN) to MIPAS QWG, 8 Jun 2004

Subject: Green light for preparations for reduced resolution operations Dear Bruno, Gaetan, Sven and fellow QWG colleages,
I have good news on the QWG preparations for MIPAS operations.
The QWG activities proposed for reduced-resolution operations will require Envisat Steering Group approval. The Envisat Steering Group will address our case on 7July. I will contact the task leaders separately to convert the inputs received so far into a more formal proposal.
In view of the urgency of the activity, the Mission Manager has approved all activities up to a ceiling equivalent to all activities to be performed prior to the steering group date. Therefore we can start already now the QWG activity defined during the ACVE-2 meeting.
Note that it is confirmed that the resolution will be reduced to 62400 fringe counts ( sweeps duration has thus been reduced by 40.99% to 1.64 seconds) Iteration within the QWG has resulted in selection of a spectral grid of 0.0625 cm-1
The activities to be performed have been provided by the task leaders:
Level 1B: task leader Gaetan Perron

formulation of proposal
generation of recalibration and recharacterisation plan and schedule
generation of New level 1 ADFs (v4.0) + documentation for new grid
generation of test and reference data set (for tests by ASTRIUM and IFAC included below)
defininition and impact assessment of new calibration resolution and scenario
full optimisation, recharacterisation and recalibration (presumably this will be well after steering group meeting)
Level 2 : task leader Bruno Carli (plus Sven Bartha for ML2PP testing)

formulation of proposal
generation of reconfiguration plan and schedule
Update of PreProcessor of ORM
MWs for pT and H2O
LUTs, IG and OM for pT and H2O
MW, LUTs, IG and OM for other NRT products
Revised NLTE error for NO2
MW, LUTs, IG and OM for OL
Test of ORM
if needed: Modification of ML2PP (Sven Bartha)
Creation of ADF for nom. scen. NRT and OL
Tests for choice of optimum meas. scenarios (These are inputs to the dedicated scientific meeting on definition of new measurement scenarios)
MW, LUTs, IG and OM for new measurement scenarios
Creation of ADF for new meas. Scenarios
Calculation of PT error propagation matrix
Calculation of AK matrix
End-to-end error assessment
For the schedules of this activity, the original dates provided by Gaetan and Bruno are to be shifted by three weeks.

Oxford MIPAS meeting#56 08 Jun 04

Oxford MIPAS meeting#56
08 Jun 04