Recent AMIL2DA quarterly
report summarised `non-standard' species retrievals attempted at various
institutes:
- IMK: OCS, ClO, SF6, C2H6, H2O2, HOCl, HCFC-22
- IFAC: CFC-11, ClONO2
- Oxf: N2O5, ClONO2, CFC-11, CFC-12, CFC-14, HCFC-22, NH3, HCN,
COF2, OCS, SF6, C2H6, HOCl, SO2, H2O2, ClO, CCl4
- IAA/IMK: NO, CO
Occupation Matrix Statistics (CP/AD)
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Cal/Val report now delivered:
PO-TN-OXF-GS-0021 (PDF File,
11 pages)
Summary of findings
- Discrepancy between the number of species
profiles (particularly NO2) and the number of pT profiles in the L2 residuals
data - often appears that there are more constituent profiles than pT
profiles (first noted in Meeting 23)
- Some unidentified Occupation Matrices have been used for O3 and H2O
(first noted in Meeting 13)
- High frequency of corrupt L1 data for 24 and 27km
which begins in August but begins to affect 5% of retrieved profiles
from October onwards. This is almost certainly related to the tendency
for nominal OM retrievals to be lost in particular latitude bands
(first noted in Meeting 24)
equator to 20N in October,
90S-65S from Nov-Jan, then 20S-20N in February.
The L1 problem is thought to relate to a fringe-count error which should
be corrected with the March software upgrade.
- Fewer CH4 retrievals than other species, and
also the 12km C-band (OM 312)
spectrum appears to be flagged as corrupt more often
than other bands.
(first noted in Meeting 23)
