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Chandra Radiation Environment Summary

See about rad_summ for the definition and origin of the values below.

Orbit start:-- (-- ksec in this period)
Current altitude/orbit leg:-- (km)
Current configuration:--
Next comm:-- (-- hours)
Next rad zone:-- (-- hours)
Last updated:--

(all times on this page are UTC)

 Attenuated - projects fluences based on upcoming SI and grating configuration
ACIS effective exposure times (ks)     Until next radzone: --     Until next comm: --
 Current FluxCurrent fluence
(total so far in current orbit)
Projected fluence
until next rad zone
Projected fluence Limits
 (p/cm^2-s-sr-MeV)(p/cm^2-sr-MeV) at current flux
(at 2X flux)
*at 10X flux*
until next comm.until second comm. 
CRM -- -- --
(--)
*--*
-- -- Yellow Limit:
1.0e+09 (fluence)
ACE P3 -- -- --
(--)
*--*
-- -- Alert Trigger:
1.0e+09 (fluence)
GOES-R (P4) -- -- -- -- --  
GOES-R (P7) -- -- -- -- --  
GOES-R (E>2.0MeV) -- -- -- -- --  
 
 External - does not take the instrument configuration into account
 Current FluxCurrent fluence
(total so far in current orbit)
Projected fluence Projected fluence   Limits
  (p/cm^2-s-sr-MeV) (p/cm^2-sr-MeV) until next radzone
(total for current orbit)
until next comm. until second comm.  
CRM -- -- --
(--)
*--*
-- --  
ACE P3 -- -- --
(--)
*--*
-- -- 3.6e8 (2 hr fluence, red)
GOES-R (P4) -- -- -- -- -- 30.0/90.9 (flux, yellow/red)
GOES-R (P7) -- -- -- -- -- 0.25/0.70 (flux, yellow/red)
GOES-R (E>2.0MeV) -- -- -- -- --  

The current fluence is calculated from the beginning on the current orbit. The ACE P3 external fluence starts integrating above 10 kkm.
* EPHIN "fluxes" are raw counts as of the last support [--], not averaged.

Attenuated CRM Proton Fluence

Green lines indicates fluence estimates based on the current KP value.