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Chandra Radiation Environment Summary

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

Orbit start: 2024:122:21:47:06 (198.9 ksec in this period)
Current altitude/orbit leg: 89332 D (km)
Current configuration: ACIS-S NONE
Next comm: 2024:125:09:59:00 (5.0 hours)
Next rad zone: 2024:125:06:27:00 (1.4 hours)
Last updated: 2024:125:05:02:00

(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: 4.8     Until next comm: 4.8
 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 9.797e+03 5.217e+08 5.687e+08
(6.157e+08)
*9.917e+08*		 5.687e+08 6.596e+08 working yellow limit:
1.000E+09 (fluence)
ACE P3 1.030e+03 1.810e+08 1.859e+08
(1.909e+08)
*2.304e+08*		 1.859e+08 1.955e+08 alert trigger: 1.000E+09 (fluence)
GOES-R (P4) 1.184e-02 1.494e+03 1.551e+03 1.551e+03 1.660e+03  
GOES-R (P7) 1.158e-03 8.516e+01 9.072e+01 9.072e+01 1.015e+02  
GOES-R (E>2.0MeV) 8.260e+00 1.709e+06 1.749e+06 1.749e+06 1.825e+06  
 
 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 9.797e+03 6.377e+08 6.878e+08 8.126e+08 1.148e+09  
ACE P3 1.030e+03 2.150e+08 2.203e+08 2.334e+08 2.686e+08 3.6e8 (2 hr fluence, red)
GOES-R (P4) 1.184e-02 1.826e+03 1.887e+03 2.037e+03 2.442e+03 30.0/90.9 (flux, yellow/red)
GOES-R (P7) 1.158e-03 1.041e+02 1.100e+02 1.248e+02 1.644e+02 0.25/0.70 (flux, yellow/red)
GOES-R (E>2.0MeV) 8.260e+00 2.089e+06 2.131e+06 2.236e+06 2.519e+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 [ 2024:125:03:27:48 (May ], not averaged.

Attenuated CRM Proton Fluence

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