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Chandra Radiation Environment Summary

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

Orbit start: 2024:128:04:42:07 (84.0 ksec in this period)
Current altitude/orbit leg: 145958 A (km)
Current configuration: ACIS-S NONE
Next comm: 2024:129:13:24:00 (9.4 hours)
Next rad zone: 2024:130:13:06:00 (33.1 hours)
Last updated: 2024:129:04:02:00

(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: 113.6     Until next comm: 33.8
 Current FluxCurrent fluence
(total so far in current orbit)		 Projected fluence
until next rad zone		 Projected fluenceProjected fluenceLimits
 (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 7.298e+01 7.974e+06 1.626e+07
(2.455e+07)
*9.085e+07*		 1.044e+07 1.254e+07 working yellow limit:
1.000E+09 (fluence)
ACE P3 1.090e+01 7.920e+05 2.030e+06
(3.268e+06)
*1.317e+07*		 1.160e+06 1.474e+06 alert trigger: 1.000E+09 (fluence)
GOES-R (P4) 0.000e+00 1.382e+02 1.382e+02 1.382e+02 1.382e+02  
GOES-R (P7) 2.315e-04 8.609e+00 3.490e+01 1.642e+01 2.309e+01  
GOES-R (E>2.0MeV) 1.154e+01 2.683e+05 1.579e+06 6.578e+05 9.901e+05  
 
 External - does not take into account the instrument configuration
 Current FluxCurrent fluence
(total so far in current orbit)		 Projected fluenceProjected 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 7.298e+01 4.280e+07 5.149e+07 4.527e+07 4.737e+07  
ACE P3 1.090e+01 3.100e+06 4.397e+06 3.468e+06 3.782e+06 3.6e8 (2 hr fluence, red)
GOES-R (P4) 0.000e+00 7.418e+02 7.418e+02 7.418e+02 7.418e+02 30.0/90.9 (flux, yellow/red)
GOES-R (P7) 2.315e-04 4.621e+01 7.376e+01 5.402e+01 6.069e+01 0.25/0.70 (flux, yellow/red)
GOES-R (E>2.0MeV) 1.154e+01 1.440e+06 2.814e+06 1.829e+06 2.162e+06  

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 [ 2024:129:03:46:05 (May ], not averaged.

Attenuated CRM Proton Fluence

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