03:13 UTC
ihu +35c cp +37c bat 27.14v +189ma rf 473ma
hi this is arissat1 rs01s dg6bce plo met 12034m ihu +34c cp +36c bat 35.39v +234ma rf 440ma
hi this is arissat1 rs01s w6dng phi met 12036m ihu +34c cp +35c bat 35.66v +165ma rf 49.ma
07:05 UTC thanks Colin, VK5HI
+37c cp +26c bat 35.69v +16ma rf 525 ma hi this is arissat1 rs01s wb4apr phi met 12266m ihu +37c cp +2.. bat 35.81v +4ma rf 446 ma hi this is arissat1 rs
The ARISSat-1 Battery voltage is decreasing each eclipse period. It therefore is taking longer for the Battery to charge up to 32.5V to allow the switch from Low Power to High Power when the satellite enters an illumination period.
The Russian Silver-Zinc (Ag-Zn) battery that is powering ARISSat-1/RadioSkaf-B is the same battery that is used to power the Russian Orlan space suits. The battery is designed for a lifetime of 5 deep charge-discharge cycles when used in the spacesuit. Using it in a spacecraft going through 14 shallow charge-discharge cycles per day is new territory.
Below is a chart of the ARISSat-1 battery voltage over the last 8 days. The graph was created by Kenneth Ransom, N5VHO. The red line marks the 32.5V level. This level of battery voltage must be reached before the satellite will switch from Low Power to High Power once it enters the sun. This was designed into the power management system to prolong the satellite’s operating life.
thanks to Kenneth, N5VHO