Oxford MIPAS meeting#84
11 Oct 05

Present

Oxford: Anu Dudhia, Jane Hurley (new D.Phil student), Chiara Piccolo, Claire Waymark.

Instrument Status [Prev] [Next]

Should now be in 'campaign mode' - 5 orbits/day covering balloon campaign in S. France using UTLS-1 mode.

Some details on the Envisat Web-Site including Instrument Availability web-site
Latest version of Mission Planning Document covering 1 Jan 05 to 28 Oct 05: [.xls] [.html]
Mission_Plan_V4.2.pdf (15JUL05), describing various modes and overall strategy.
Table_4_V4.3.pdf (08OCT05) overall plan until end of 2005.

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

[Plots of profile locations]

Oxford local directories have now been reorganised to sort all L2 OFL data by version number as well as date. Plots will eventually be modified to show this.
Reprocessed v4.62 data continues to arrive via automatic ftp, most recently on 29Sep05.

HiRDLS Comparisons (CW) [Prev] [Next]

Comparing HiRDLS retrievals with locally-retrieved MIPAS profiles for 28th January 2005 and 1st March 2005. Now added ClONO2 and N2O5

ClONO2: HIRDLS slightly high in stratosphere but similar shape
N2O5: similar 25-35km, but large variations in HIRDLS below.
Probably need to separate day/night profiles for both these species

N2O5 (JW) [Next]

N2O5 is retrieved with fairly poor precision using the standard MIPAS microwindow approach, thought to be due to retrieving both continuum and N2O5 in each microwindow. Investigating the following error analyses:

Retrieve only N2O5
Retrieve N2O5 plus single continuum and offset across whole band
Retrieve N2O5 plus independent continuum and offset in each 3cm-1 microwindow (simulating 'operational' approach).

Preliminary investigations with actual microwindows suggests significantly larger N2O5 values are retrieved if continuum is completely ignored, but needs further examination.

O3 Isotopes (CP) [Prev] [Next]

Resuming work on investigating microwindows for retrieving O3 isotopic concentrations. Current results indicate much larger concentrations of heavy isotopes than predicted by models, but retrieved values still not considered reliable.

Aura Science Team Meeting [Prev] [Next]

Expected participants from Oxford MIPAS group:

Chiara Piccolo, comparing MIPAS and TES limb measurements
Claire Waymark, comparing MIPAS and HIRDLS
Joanne Walker, comparing MIPAS and MLS CO measurements

All using MIPAS 2RR data from 2005 rather than Off Line products (so no direct connection with MIPAS validation groups).

TES (CP) [Prev] [Next]

The JPL team have recently informed us that there is a bug in both the limb and nadir L1B spectra that they have sent to us (their own version of the data, not the 'official' archived version). This is being fixed and the corrected data will be resent.

Spectroscopic Data (JH) [Prev] [Next]

Version 3.2 of the MIPAS spectroscopic database has now been released.

Before recalculating LUTs using the new data, some tests will be performed to check difference between this and previously used version (3.1).

2RR Microwindows (ie 0.0625cm^-1 resln) (AD) [Prev] [Next]

Selecting microwindows for new nominal mode operations which employ floating altitude grid

MWs & LUTs for CFC-12, N2O5 and ClONO2 completed, CFC-11 will shortly be completed
Now starting on MW selection for CO retrievals (LTE-assumed).

Oxford MIPAS meeting#84 11 Oct 05

Oxford MIPAS meeting#84
11 Oct 05