MAR-6 based VHF Masthead
7 Element YAGI - constructed from re-cycled commercial TV antenna parts.
As the Arissat-1 battery has failed which means no satellite downlink transmission "after dark" and as all good passes over the Australian continent seem to be between dusk and dawn (local), no pictures are being received at my station!
Also if you do get a pass just after dawn (satellite moving west to east, coming out of eclipse) there seems to be quite a delay after leaving eclipse before the satellite electronics "boots-up" - such that you only get a short amount of downlink just before LOS.
Also: from http://www.ariss-sstv.blogspot.com//
Thursday, September 29, 2011
Seems with the current orbital timing that folks in the Northern hemisphere are at a disadvantage due to the early morning passes being silent because the delay timer is not activating the transmitter until about 15 minutes after the satellite comes out of eclipse.
For folks in the Southern hemisphere there are some excellent day and evening passes occurring for the next couple of weeks.
Hope to see a few more images from Australia, South America, Africa and some of the equatorial regions during this time frame.
SUCCESS, one of my 'downlinks' has been included in the ARISSAT SSTV Gallery !
Previously I had tried (without much success) a dual JFET based masthead amplifier, the design and function which looked appealing. Here is a link for those who may be interested ?
The Amateur Radio satellite ARISSat-1 deployed from the ISS on August 3, 2011 fell silent on Wednesday, January 4, 2012 when it re-entered the Earth's atmosphere.
In my time tracking ARISSat-1, I was able to receive about 110 - 120 SSTV images of various quality.
The graphic below shows the last telemetry frame and SSTV images received before descent and "burning-up" on re-entry!
Its predicted impact point was in an open area of the South Atlantic west of Angola.
An ignominious end for the little satellite!