Cimel CE318-T, Руководство пользователя

Страница: 58 / 91

CE318-T Photometer
User Operation Manual
Revision V4.10 October 2021
57
CIRCLE (only with BRDF/CE318-TU photometers): The CIRCLE scenario consists
in measuring at the constant polar with varying azimuthal angles from 0 to 360° with
5° steps using SKY gains.
Filters used and their sequence
BRDF BRDF 12 filters
1640 nm (InGaAs channel) 1640 nm (InGaAs channel)
870 nm 870 nm
675 nm 675 nm
440 nm 440 nm
550 nm 500 nm
740 nm 550 nm
782 nm
740 nm
702 nm
415 nm
BRDF (only with BRDF photometers): The BRDF scenario consists in launching
successive CIRCLE scenarios, starting from a polar angle of 5° and finishing with a
polar angle of 60°.
Filters used and the sequence is the same than CIRCLE scenario.
PRS (only with SEAPRISM / CE318-TV12 photometers) : The Sea Prism scenario
consists in making M measures on the sea and N on the sky (see NMSea, NMSky
parameters). This scenario is executed 8 times one for each filter.
It is important to notice that AHL and AHR parameters impose spatial restrictions in
Sea measurements. Indeed, ideally the photometer would have a field of view of 360°
to make sea measurements. In practice, the photometer is usually installed on an off-
shore platform or on a jetty. Then the field of view is reduced and AHL and AHR enable
to set this reduced field of view to only measures the sea radiance.