KOZ (KEEP OUT ZONE) / ECLIPSE
The GOES satellites encounter two periods, during the year, in which the satellites are in the Earth's shadow. Known as the Eclipse (ECL) season, these periods require the spacecraft to be totally dependent on onboard batteries for a maximum of 72 minutes daily. Eclipse's occur from about February 28 - April 11 and August 31 - October 13.
GOES-13/14/15 - There is a significant risk of the sun light directly entering the scanners and causing degraded products, as the spacecraft enters and leaves the Earth's shadow, requiring a special algorithm to be applied to the Imager products. In some cases shifting or cancelling the frame is necessary. This is known as the "Stray Light Zone (SLZ)". The seasonal charts describe the GOES-East and GOES-West Imager and Sounder scan frames that are canceled or shifted, due to SLZ.
GOES-12 - The Imager and Sounder instruments are powered down to conserve power, until the daily eclipse is over. There is a significant risk of the sun light directly entering the scanners and damaging the instruments, as the spacecraft enters and leaves the Earth's shadow, requiring the Imager and Sounder to be idle prior to and following eclipse. This is known as the "Keep Out Zone (KOZ)". The seasonal charts describe the GOES-South America Imager and Sounder scan frames that are canceled, due to KOZ/ECL.
Seasonal Charts: Spring 2013 Schedule
GOES Spring Schedules (Excel file xls