Medspiration – System Requirements Document - Data User Element

Medspiration
System Requirements Document
MED-SOC-RS-001_1
Issue F
IR SST
(Input)
sunglint
raise flag
calculate distance to
cloud (Dcloud)
Use DT_min and
Dcloud to calculate
IPCV
IPCV=6
n
upwelling
map
y
Upwelling
y
n
assign
IPCV to 1
(cloudy)
IR SST
(output)
Figure 3-3 Procedure for determining infrared proximity confidence value (IPCV)
The proximity confidence value for SST measurements derived from infrared sensors
(IPCV) flags the likelihood of cloud contamination of pixels which have already passed
the cloud screening of the system which generated the ingested L2 products. It is based
(see Figure 3-3) on the proximity to known cloudy pixels, and on comparison with
expected (reference) SST values, but also needs information about the likelihood of
upwelling. The process of deriving it gives rise to the following system requirements.
© 2004 SOC Page 40 of 193