Hi Stuart,
You are correct. The polarisation part of the MetMM interface for ISMAR
and MARSS assumes that pitch and roll are both zero. To handle MARSS and
ISMAR in a totally general way would require to introduce a number of
new ARTS variables, and it would not still be possible to get MARSS and
ISMAR inte MetMM. So this is a bit of an open issue still.
Accordingly, you need to derive polarised channel values outside of ARTS
for cases when Q is substantial and you want high accuracy.
Bye,
Patrick
On 2016-09-29 12:27, Fox, Stuart wrote:
Hi,
Is it possible yet to properly handle the sensor polarisation response
in ARTS for aircraft-based along-track scanners (ISMAR and MARSS) where
the detected polarisation rotates with scan angle, for arbitrary
platform orientations? I think it is possible to use the MetMM interface
for wings-level flight - has anything been developed yet that works for
non-zero aircraft roll angles, and if so then how do I provide the
required inputs? Or is it best to just calculate H & V (or I and Q)
responses and combine them myself afterwards?
Thanks,
Stuart
Dr Stuart Fox Radiation Research Scientist
*Met Office* FitzRoy Road Exeter Devon EX1 3PB United Kingdom
Tel: +44 (0)1392 885197 Fax: +44 (0)1392 885681
Email: stuart@metoffice.gov.uk Website: www.metoffice.gov.uk
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