Page content updated: 2026:117:00:45:00 ( 8:45 PM Sun 26-Apr )

Key Snapshot and SOH Values (from current comm)
Obsid32316
Format2_NORM
RadMonENAB
CPE StatusNORM
RA202.102
Dec-31.590
Roll326.063
Pitch158.77
Sim Z92903
Sim Focus-535
HETG angle77.59
LETG angle75.71
SCS 107INAC
SCS 128ACT
SCS 129ACT
SCS 130INAC
RadMonENAB
SCS 131ACT
SCS 132ACT
SCS 133INAC
Snapshot from 2026:117:00:43:27 (from current comm)

acePred
NOW
Cursor date
Cursor delta
Next comm
Delta
Station
Activity
ACE fluence
ACE P3 flux
HRC proxy
--- Latest values ---
ACE P3 flux
ACE 2hr avg
HRC proxy
SIM-Z
Pitch
RA
Dec
Roll
PCAD
Obsid
SI
Grating
SI mode
Power cmd
CCD, FEP
Vid, Clock

Chandra Events (Load link unavailable)
Time (UT)EventDelta timeTime (Eastern)
2026:116:13:00:00ER Obsid: 41529 (3 ksec) Purpose: Perigee Attitude -11:45 9:00 AM Sun 26-Apr
2026:116:14:10:00Comm pass on DSS-56 (duration 1:00)-10:3510:10 AM Sun 26-Apr
2026:116:15:33:03Maneuver to 152.26500 -38.38010 277.006 [2026:116:15:53:21]- 9:1111:33 AM Sun 26-Apr
2026:116:15:33:38Grating: NONE- 9:1111:33 AM Sun 26-Apr
2026:116:15:35:33RADMON Enable- 9:0911:35 AM Sun 26-Apr
2026:116:16:00:48Obsid: 32308 SI: ACIS-S (22 ksec) Target: AM1006-380 - 8:4412:00 PM Sun 26-Apr
2026:116:22:07:28Maneuver to 202.10650 -31.59174 326.065 [2026:116:22:28:30]- 2:37 6:07 PM Sun 26-Apr
2026:116:22:33:00Obsid: 32316 SI: ACIS-I (10 ksec) Target: Abell 3558 SE - 2:12 6:33 PM Sun 26-Apr
2026:117:00:15:00Comm pass on DSS-56 (duration 1:00)- 0:30 8:15 PM Sun 26-Apr
2026:117:00:45:00--------------- NOW --------------- 0:00 8:45 PM Sun 26-Apr
2026:117:01:16:40Load APR2726A:CL117:0101 [2026:118:11:59:24] 0:31 9:16 PM Sun 26-Apr
2026:117:01:16:40Load APR2726A:CL117:0101 [2026:118:11:59:24] 0:31 9:16 PM Sun 26-Apr
2026:117:01:19:40Maneuver to 17.89498 -38.08300 160.326 [2026:117:01:55:28] 0:34 9:19 PM Sun 26-Apr
2026:117:01:59:58Obsid: 30228 SI: ACIS-S (12 ksec) Target: NGC 424 1:14 9:59 PM Sun 26-Apr
2026:117:05:19:58Maneuver to 220.59292 -17.27660 53.998 [2026:117:05:58:12] 4:34 1:19 AM Mon 27-Apr
2026:117:06:02:42Obsid: 30189 SI: ACIS-S (11 ksec) Target: NGC5728 5:17 2:02 AM Mon 27-Apr
2026:117:09:14:22Maneuver to 17.89833 -38.08426 157.020 [2026:117:09:52:43] 8:29 5:14 AM Mon 27-Apr
2026:117:09:57:13Obsid: 32321 SI: ACIS-S (18 ksec) Target: NGC 424 9:12 5:57 AM Mon 27-Apr
2026:117:11:00:00Comm pass on DSS-26 (duration 1:00) 10:15 7:00 AM Mon 27-Apr
2026:117:14:57:13Maneuver to 220.59277 -17.27989 54.998 [2026:117:15:35:35] 14:1210:57 AM Mon 27-Apr
2026:117:15:40:05Obsid: 30199 SI: ACIS-S (15 ksec) Target: NGC5728 14:5511:40 AM Mon 27-Apr
2026:117:17:45:00Comm pass on DSS-34 (duration 1:00) 17:00 1:45 PM Mon 27-Apr
2026:117:20:05:05Maneuver to 335.87032 -50.28284 122.844 [2026:117:20:36:46] 19:20 4:05 PM Mon 27-Apr
2026:117:20:41:16Obsid: 30046 SI: ACIS-S (22 ksec) Target: SPT-CLJ2223-501 19:56 4:41 PM Mon 27-Apr
2026:118:02:30:00Comm pass on DSS-56 (duration 1:00) 1d 01:4510:30 PM Mon 27-Apr
2026:118:02:56:16Maneuver to 220.59427 -17.28150 58.362 [2026:118:03:28:04] 1d 02:1110:56 PM Mon 27-Apr
2026:118:03:32:34Obsid: 32320 SI: ACIS-S (15 ksec) Target: NGC5728 1d 02:4711:32 PM Mon 27-Apr
2026:118:07:50:54Maneuver to 335.86812 -50.28549 117.027 [2026:118:08:22:56] 1d 07:05 3:50 AM Tue 28-Apr
2026:118:08:27:26Obsid: 32319 SI: ACIS-S (22 ksec) Target: SPT-CLJ2223-501 1d 07:42 4:27 AM Tue 28-Apr
2026:118:10:00:00Comm pass on DSS-26 (duration 1:00) 1d 09:15 6:00 AM Tue 28-Apr
2026:118:14:05:00Comm pass on DSS-24 (duration 0:45) 1d 13:2010:05 AM Tue 28-Apr
2026:118:14:05:00Load APR2726A:CL118:1401 [2026:119:21:00:02] 1d 13:2010:05 AM Tue 28-Apr
2026:118:14:05:00Load APR2726A:CL118:1401 [2026:119:21:00:02] 1d 13:2010:05 AM Tue 28-Apr
2026:118:14:42:26Maneuver to 230.85116 12.69882 134.998 [2026:118:15:20:54] 1d 13:5710:42 AM Tue 28-Apr
2026:118:15:25:24Obsid: 29883 SI: ACIS-S (10 ksec) Target: SDSS J152322.13 1d 14:4011:25 AM Tue 28-Apr
2026:118:18:26:59Maneuver to 215.70000 -11.90000 182.138 [2026:118:18:50:09] 1d 17:41 2:26 PM Tue 28-Apr
2026:118:18:30:33Grating: HETG 1d 17:45 2:30 PM Tue 28-Apr
2026:118:18:32:36RADMON Disable 1d 17:47 2:32 PM Tue 28-Apr
2026:118:18:54:39ER Obsid: 41528 (3 ksec) Purpose: Perigee Attitude 1d 18:09 2:54 PM Tue 28-Apr
2026:118:20:15:34Maneuver to 8.00000 58.00000 37.225 [2026:118:20:55:30] 1d 19:30 4:15 PM Tue 28-Apr
2026:118:21:00:00ER Obsid: 41527 (3 ksec) Purpose: Perigee Attitude 1d 20:15 5:00 PM Tue 28-Apr
2026:118:23:04:42Maneuver to 51.70000 -30.95000 200.801 [2026:118:23:55:30] 1d 22:19 7:04 PM Tue 28-Apr
2026:119:00:00:00ER Obsid: 41526 (3 ksec) Purpose: Perigee Attitude 1d 23:15 8:00 PM Tue 28-Apr
2026:119:01:15:00Comm pass on DSS-34 (duration 1:00) 2d 00:30 9:15 PM Tue 28-Apr
2026:119:01:20:23Maneuver to 205.00000 -36.00000 332.658 [2026:119:01:55:30] 2d 00:35 9:20 PM Tue 28-Apr
2026:119:02:00:00ER Obsid: 41525 (3 ksec) Purpose: Perigee Attitude 2d 01:1510:00 PM Tue 28-Apr
2026:119:03:20:23Maneuver to 51.70000 -30.95000 200.615 [2026:119:03:55:30] 2d 02:3511:20 PM Tue 28-Apr
2026:119:04:00:00ER Obsid: 41524 (3 ksec) Purpose: Perigee Attitude 2d 03:1512:00 AM Wed 29-Apr
2026:119:05:16:08Maneuver to 215.90000 -19.25000 340.000 [2026:119:05:55:30] 2d 04:31 1:16 AM Wed 29-Apr
2026:119:06:00:00ER Obsid: 41523 (1 ksec) Purpose: Perigee Attitude 2d 05:15 2:00 AM Wed 29-Apr
2026:119:06:49:34Maneuver to 50.68412 -37.09209 197.000 [2026:119:07:27:41] 2d 06:04 2:49 AM Wed 29-Apr
2026:119:06:50:08Grating: NONE 2d 06:05 2:50 AM Wed 29-Apr
2026:119:07:09:53RADMON Enable 2d 06:24 3:09 AM Wed 29-Apr
2026:119:07:32:11Obsid: 31877 SI: ACIS-S (13 ksec) Target: NGC1317 2d 06:47 3:32 AM Wed 29-Apr
2026:119:10:50:00Comm pass on DSS-26 (duration 1:00) 2d 10:05 6:50 AM Wed 29-Apr
2026:119:11:17:11Maneuver to 149.92588 0.44645 254.175 [2026:119:11:50:04] 2d 10:32 7:17 AM Wed 29-Apr
2026:119:11:54:34Obsid: 31106 SI: ACIS-S (60 ksec) Target: EP260321a 2d 11:09 7:54 AM Wed 29-Apr
2026:119:19:30:00Comm pass on DSS-65 (duration 1:00) 2d 18:45 3:30 PM Wed 29-Apr

CXO and GOES rates
CXOGOESLimit
HRC shield017250
HRC MCP611930
P4GM---0.06300
P41GM---0.018.47
CXO: from snapshot at 2026:117:00:43:27 (- 0:01)
GOES proxies: scaled 15 min average of GOES-16
Last avgs at HRC: - 0:20   P4GM: - 0:17   P41GM: - 0:20
ACE rates
Value2hr limitOrbital limitHours to
Orbital limit
Current flux6675000012000> 30
2hr avg flux7175000012000> 30
Orbital fluence2.8x107---2.0x109---
ACE data from 2026:117:00:30:00 (- 0:15)
Orbital fluence: integrated attenuated ACE flux
Grating attenuation not factored into current or 2hr flux numbers
RADMON and SOT alert limits information

ACE particle rates ( MTA SWPC )

GOES particle rates

GOES proxy for HRC shield rates

3-day Solar-Geophysical Forecast
Geophysical ActivityGeophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 527 km/s at 26/0848Z. Total IMF reached 14 nT at 26/0318Z. The maximum southward component of Bz reached -13 nT at 26/0318Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 572 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (27 Apr), quiet levels on day two (28 Apr) and quiet to unsettled levels on day three (29 Apr). Protons have a slight chance of crossing threshold on days one, two, and three (27 Apr, 28 Apr, 29 Apr).
Solar ActivityAnalysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity has been at moderate levels for the past 24 hours. There are currently 7 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is likely to be moderate with a slight chance for an X-class flare on days one, two, and three (27 Apr, 28 Apr, 29 Apr).

Solar X-ray Activity

Solar Wind Data ( SOHO ACE )

Solar Flare Monitor