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What a coincidence, I'm working on the core flight system project right now, which includes an implementation of CCSDS File Delivery Protocol. You might be happ

What a coincidence, I'm working on the core flight system project right now, which includes an implementation of CCSDS File Delivery Protocol. You might be happy to know that project is still very much alive within NASA (you were probably already aware).

oso2k 8y ago
Haha. Great to hear that work still lives! I hope you’re not using the (horrible in retrospect) stuff I wrote 15 years ago that worked on 2.0-2.6 kernels. I remember porting the network kernel driver from 2.0-2.2 manual build system to implementing a (really basic) Makefile that worked with 2.0-2.6.0ish kernels (which were newer at the time). I knew Scott Burleigh was still innovating CCSDS and other protocols at JPL, and, IIRC the work I had done had also been delivered to Ames and ESA for test lab use. I had some other work to create protocol dissectors for Ethereal (before the name change to WireShark). WireShark now includes built in dissectors for CCSDS, CFDP and others.
justinclift 8y ago
Fairly off topic ;), but any idea if SQLite is used on any of the rovers, spacecraft, etc? Mostly from idle curiosity. Was wondering a few days ago and guessing "probably yes", but no idea who to ask. So, taking the opportunity (heh) now. :)
- jakeinspace 8y ago
  I don't know about rovers, but some smaller spacecraft (mainly satellites) use mysql, as well as postgres. Disclaimer: I'm not the right person to ask.
- oso2k 8y ago
  The small parts of the Mars Rovers (MER) I worked on or worked with didn’t use SQLite. It was too early in SQLite’s history for it to be used on MER. MER also used VxWorks which probably didn’t have a lot in the way of POSIX support at the time. I remember other devs telling me the fun they had supporting 1553 bus on “such a new RTOS”. Wikipedia say MSL used VxWorks as well. I’d have to ask a buddy still doing Mission Ops Support at JPL but I’d think the answer is no SQLite on MER or MSL missions. The OSes were fairly custom, non-POSIX builds. The ESA folks might have tried though on their missions.
  - justinclift 8y ago
    No worries. Been meaning to investigate VxWorks at some point, mostly from an interest in embedded devices (for specific wearables concepts). This will be another thing to add for that list. :)
- planteen 8y ago
  Not a Mars spacecraft, but SQLite has definitely been used on some CubeSat missions in LEO. I know because I'm the one who did it. :-)
  - justinclift 8y ago
    Cool. :)
  - oso2k 8y ago
    Was it a commercial or government CubeSat?
    - planteen 8y ago
      As far as I know, it has flown on two government (civil space) missions. I'm not longer at the company so I don't know what else it has or will go into.

oso2k 8y ago

Haha. Great to hear that work still lives! I hope you’re not using the (horrible in retrospect) stuff I wrote 15 years ago that worked on 2.0-2.6 kernels. I remember porting the network kernel driver from 2.0-2.2 manual build system to implementing a (really basic) Makefile that worked with 2.0-2.6.0ish kernels (which were newer at the time). I knew Scott Burleigh was still innovating CCSDS and other protocols at JPL, and, IIRC the work I had done had also been delivered to Ames and ESA for test lab use. I had some other work to create protocol dissectors for Ethereal (before the name change to WireShark). WireShark now includes built in dissectors for CCSDS, CFDP and others.

justinclift 8y ago

Fairly off topic ;), but any idea if SQLite is used on any of the rovers, spacecraft, etc? Mostly from idle curiosity. Was wondering a few days ago and guessing "probably yes", but no idea who to ask. So, taking the opportunity (heh) now. :)

jakeinspace 8y ago
I don't know about rovers, but some smaller spacecraft (mainly satellites) use mysql, as well as postgres. Disclaimer: I'm not the right person to ask.
oso2k 8y ago
The small parts of the Mars Rovers (MER) I worked on or worked with didn’t use SQLite. It was too early in SQLite’s history for it to be used on MER. MER also used VxWorks which probably didn’t have a lot in the way of POSIX support at the time. I remember other devs telling me the fun they had supporting 1553 bus on “such a new RTOS”. Wikipedia say MSL used VxWorks as well. I’d have to ask a buddy still doing Mission Ops Support at JPL but I’d think the answer is no SQLite on MER or MSL missions. The OSes were fairly custom, non-POSIX builds. The ESA folks might have tried though on their missions.
- justinclift 8y ago
  No worries. Been meaning to investigate VxWorks at some point, mostly from an interest in embedded devices (for specific wearables concepts). This will be another thing to add for that list. :)
planteen 8y ago
Not a Mars spacecraft, but SQLite has definitely been used on some CubeSat missions in LEO. I know because I'm the one who did it. :-)
- justinclift 8y ago
  Cool. :)
- oso2k 8y ago
  Was it a commercial or government CubeSat?
  - planteen 8y ago
    As far as I know, it has flown on two government (civil space) missions. I'm not longer at the company so I don't know what else it has or will go into.