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Chandra Radiation Environment Summary

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

Orbit start: 2024:292:03:32:06 (2.4 ksec in this period)
Current altitude/orbit leg: 16981 A (km)
Current configuration: HRC-S HETG
Next comm: 2024:292:10:19:00 (6.1 hours)
Next rad zone: 2024:294:11:01:00 (54.8 hours)
Last updated: 2024:292:04:12:00

(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: 178.1     Until next comm: 3.2
 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 0.000e+00 0.000e+00 0.000e+00
(0.000e+00)
*0.000e+00*		 0.000e+00 0.000e+00 working yellow limit:
1.000E+09 (fluence)
ACE P3 0.000e+00 0.000e+00 0.000e+00
(0.000e+00)
*0.000e+00*		 0.000e+00 0.000e+00 alert trigger: 1.000E+09 (fluence)
GOES-R (P4) 0.000e+00 0.000e+00 0.000e+00 0.000e+00 0.000e+00  
GOES-R (P7) 0.000e+00 0.000e+00 0.000e+00 0.000e+00 0.000e+00  
GOES-R (E>2.0MeV) 0.000e+00 0.000e+00 0.000e+00 0.000e+00 0.000e+00  
 
 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 4.030e+01 1.090e+05 8.062e+06 9.984e+05 2.074e+06  
ACE P3 8.370e+01 0.000e+00 1.652e+07 1.847e+06 4.082e+06 3.6e8 (2 hr fluence, red)
GOES-R (P4) 6.465e-02 1.149e+02 1.287e+04 1.542e+03 3.268e+03 30.0/90.9 (flux, yellow/red)
GOES-R (P7) 6.946e-04 2.224e+00 1.393e+02 1.755e+01 3.610e+01 0.25/0.70 (flux, yellow/red)
GOES-R (E>2.0MeV) 7.181e+01 4.927e+04 1.422e+07 1.634e+06 3.551e+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 [ 2024:292:01:40:26 (Oct18) ], not averaged.

Attenuated CRM Proton Fluence

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