Brief Introduction to ScaRaB Project


The Scanner for Radiation Budget (ScaRaB) is a joint Earth Radiation Budget (ERB) project of France, Russia, and Germany intended to provide a continuation of the ERBE scanner mission. The first ScaRaB flight model (FM1) flew on the Russian Meteor-3/7 weather satellite in 1994-1995. The second model flew on the Russian Resurs-01/4 satellite in 1998-1999.

The ScaRaB instrument is a cross-track scanning radiometer consisting of two broadband and two narrowband channels with identical fields of view. The broadband shortwave (SW: 0.2-4 um) and total radiation (TW: 0.2-50 um) channels of ScaRaB, from which the reflected shortwave and emitted longwave (LW: nominally 4-50 um) radiances (as a result of weighted subtraction of the SW from the TW channels), are analogous to those of the ERBE scanner. The two narrowband channels are similar to the weather satellite imager channels used in the ISCCP analysis, one corresponding to visible portion of the solar spectrum (VIS: 0.55-0.65 um), the other to the infrared atmospheric window (IRW: 10.5-12.5 um).