CHANDRA SNAPSHOT

The Chandra Snapshot provides a quick look of critical 
spacecraft components in realtime.


Access
There are Primary and Backup versions of the Snapshot.
** Refer to SOT Home for updated links.

Additionally, the first generation snapshot exists for reference at:

http://cxc.harvard.edu/cgi-gen/mta/snap.cgi

There are also text-only copies of all three versions:
/pool14/chandra/chandra1.snapshot - primary
/pool14/chandra/chandra2.snapshot - backup
/pool14/chandra/chandra.snapshot  - first generation


Sections (top to bottom)
- Current (as of last contact if LOS) time, Radiation Environment, Altitude
   f_ace: past 2-hour ACE fluence
   F_CRM: CRM orbital fluence on ACIS

- Current (as of last contact if LOS) spacecraft state

- browser buttons for access to last ~3 days' snapshots

- Current data - up-to-the-minute altitude and Radiation environment


Color Scheme (not applicable for first generation snapshot)
Some state and limit checking is performed and indicated as follows:
- white = unchecked
- green = within limits/matches expected state
- yellow = warning limit/suspicious state
- red = limit violation/does not match expected state
- blue = unchecked (for quantities that are usually checked,
   for instance RA, Dec, and Roll may not be checked in NMAN mode,
   and Ephin rates are not checked in the Rad zones)
- purple = stale data (value is more than 15 minutes old, usually means
   quantity is unavailable in current telemetry format)


Violation Notification
E-mail alerts/pages will be generated and distributed as follows:

Problems or questions? Contact bspitzbart at cfa.harvard.edu