1.There is a need to
better come to grips with the continually
changing observing system.
2.There is no baseline network to anchor
the analyses or space
observations.
The
radiosonde network is not it!3.The challenge is to
improve continuity and be able to relate
a current set of observations to those taken 20 years
ago (or in the future).
4.There is a need for more attention to
data synthesis, reprocessing, analysis and re-analysis of existing data sets; and
5. There must be a baseline set of
measurements:
S Sparse network (30-40) of
Òreference sondesÓ for satellite
calibration and climate monitoring,
UT water vapor;
co-located with regular sonde sites to replace them
at appropriate times; integrated with ozone sondes and/or
GAW and BSRN = GRUAN?
S GPS Radio Occultation.