Winston
Lorenzo von Matterhorn
- Joined
- Jan 31, 2009
- Messages
- 9,560
- Reaction score
- 1,749
All of the content from the additional cameras included this time recording the 'chute deployment pointing upward and the landing looking downward will only be uplinked eventually if the rover lands successfully. They will not be live nor will be the audio from the microphone.
Mars Rover Landing - 3 DAYS LEFT
Nice comparison of Pathfinder rover Sojourner vs Perseverance:
Mars 2020 rover: How far we've come
The Sojourner computer specs in that video are slightly incorrect although it's correct about the CPU being the same type as in the Tandy 100. Only CPU main memory RAM was 64K:
A Description of the Rover Sojourner
https://mars.nasa.gov/MPF/rover/descrip.html
Control is provided by an integrated set of computing and power distribution electronics. The computer is an 80C85 rated at 100Kips which uses, in a 16Kbyte page swapping fashion, 176Kbytes of PROM and 576Kbytes of RAM. The computer performs I/O to some 70 sensor channels and services such devices as the cameras, modem, motors and experiment electronics.
It's so difficult to find any decent material on Sojourner that isn't behind a paywall. This one is a crappy OCR text scan from a document:
https://trs.jpl.nasa.gov/bitstream/handle/2014/22611/97-1122.pdf
At bootup or upon reset the computer begins execution from the radhard PROM. The programming stored in PROM loads programs into the radhard RAM from non-volatile RAM. Program execution proceeds from the RAM: As commands are executed, other programming in non-volatile RAM is required and then swapped into the RAM for execution. To prevent excessive thrashing, some programs are executed from non-volatile RAM.
Sojourner Picture and Video Files
https://mars.nasa.gov/MPF/rovercom/pix.html
Six wheels on the ground: NASA's Mars rovers
https://trs.jpl.nasa.gov/bitstream/handle/2014/45159/10-4139_A1b.pdf
Mars Rover Landing - 3 DAYS LEFT
Nice comparison of Pathfinder rover Sojourner vs Perseverance:
Mars 2020 rover: How far we've come
The Sojourner computer specs in that video are slightly incorrect although it's correct about the CPU being the same type as in the Tandy 100. Only CPU main memory RAM was 64K:
A Description of the Rover Sojourner
https://mars.nasa.gov/MPF/rover/descrip.html
Control is provided by an integrated set of computing and power distribution electronics. The computer is an 80C85 rated at 100Kips which uses, in a 16Kbyte page swapping fashion, 176Kbytes of PROM and 576Kbytes of RAM. The computer performs I/O to some 70 sensor channels and services such devices as the cameras, modem, motors and experiment electronics.
It's so difficult to find any decent material on Sojourner that isn't behind a paywall. This one is a crappy OCR text scan from a document:
https://trs.jpl.nasa.gov/bitstream/handle/2014/22611/97-1122.pdf
At bootup or upon reset the computer begins execution from the radhard PROM. The programming stored in PROM loads programs into the radhard RAM from non-volatile RAM. Program execution proceeds from the RAM: As commands are executed, other programming in non-volatile RAM is required and then swapped into the RAM for execution. To prevent excessive thrashing, some programs are executed from non-volatile RAM.
Sojourner Picture and Video Files
https://mars.nasa.gov/MPF/rovercom/pix.html
Six wheels on the ground: NASA's Mars rovers
https://trs.jpl.nasa.gov/bitstream/handle/2014/45159/10-4139_A1b.pdf