ISHMAEL.CFA.HARVARD.EDU LIVE ACIS DATA: MEAN VALUES, SIGMAS, AND STATUS
ACIS Live: Mean Engineering Data - ISHMAEL.CFA.HARVARD.EDU
Web Page Last Updated: Tue Apr 28 13:45:01 UTC 2026
TIME OF LAST DATUM REC'D WAS Tue Apr 28 10:57:16 GMT 2026
DATA WAS IN FMT2 & OBSID 32319 WAS IN PROGRESS
WE ARE CURRENTLY LOS
I last saw data on Tue Apr 28 10:57:30 GMT 2026 (Day 118)

Tracelog File Status is: FRESH

Check the ACIS Limits table

CURRENT ORBITAL INFORMATION

EXPECTED SCHEDULED STATE AT:   Tue Apr 28 13:45:01 UTC 2026 (Day 118)

FP INSTRUMENT
GRATINGS STATUS
OBSID
TLM FORMAT
DITHER STATUS
SCS-155 STATUS
ACIS-S ( 75624 )
HETG-OUT/LETG-OUT
32319
FMT2
ENAB
COACTS1

REAL-TIME STATE AT:                       Tue Apr 28 10:57:30 GMT 2026 (Day 118)

FP INSTRUMENT
GRATINGS STATUS
OBSID
TLM FORMAT
DITHER STATUS
SCS-155 STATUS
ACIS-S     (75624.00)
HETG-OUT/LETG-OUT
32319
FMT2
ENAB
ACT



SCS-155 Deadman Status at:   Tue Apr 28 13:45:01 UTC 2026 (Day 118)

SCS-155 Deadman
Description
Latest Real Time Contact State
COSCS155S - 9 daySCS-155 Active Status
ACT



CURRENT RADIATION ENVIRONMENT ON CHANDRA

Start Time Tue Apr 28 10:57:13 GMT 2026
End Time Tue Apr 28 10:52:18 GMT 2026


HRC RADMON
Description
MEAN VALUE
SIGMA OF THE MEAN
SCS107 Limit
MCPTOT_B - 9 dayuncalibrated MCP total rate
20.10
1.30
30
SHIELD_B - 9 dayuncalibrated shield rate
21.30
0.60
245

LATEST ORBITAL FLUENCE DATA AT:   Tue Apr 28 13:45:01 UTC 2026

ALTITUDE
LATEST ACIS FLUX (ACE P3 CHANNEL)
ACIS FLUENCE (ACE P3 CHANNEL)
109500 km D
1.49e+02
6.613e+07



ACE 24 Hour EPAM FLUX AND FLUENCE DATA AT:   Tue Apr 28 13:45:01 UTC 2026

ALTITUDE
Plot
LAST P3
LAST Att. P3
ORB. Att. P3 FLU
ORB. Frac.
YEAR Att P3 FLU
109500 km D
24hr Plots
1.880e+02
1.880e+02
3.983e+07
0.566
6.982e+09

Date of Last P3 Data Point:   2026:117:18:42:47.00


Description of ACE 24 Hour table header items. Start Time: Tue Apr 28 10:57:15 GMT 2026



Target and Actual Quaternions:   Tue Apr 28 13:45:01 UTC 2026


MSID
Description
Value
TimeTime of the last value
Tue Apr 28 10:57:15 GMT 2026
AOTARQT1TARGET ATTITUDE QUATERNION 1
0.8012982600
AOTARQT2TARGET ATTITUDE QUATERNION 2
0.0556397510
AOTARQT3TARGET ATTITUDE QUATERNION 3
-0.4531483700
--------TARGET ATTITUDE QUATERNION 4
---------
AOATTQT1ACTUAL ATTITUDE QUATERNION 1
0.8013042200
AOATTQT2ACTUAL ATTITUDE QUATERNION 2
0.0556779650
AOATTQT3ACTUAL ATTITUDE QUATERNION 3
-0.4531479500
AOATTQT4ACTUAL ATTITUDE QUATERNION 4
0.3866112200


SIM AND FOCUS POSITIONS



Start Time: Tue Apr 28 10:56:51 GMT 2026
End Time: Tue Apr 28 10:56:51 GMT 2026

MSID
DESCRIPTION
LAST VALUE
[37]TSCPOSSIM TT Position
75624.00 / -1.00
[37]FAPOSSIM FA Position
-467.00 / -1.00
4HPOS[AB]ROHETG Angle
77.59 / 78.34
4LPOS[AB]ROLETG Angle
76.84 / 75.71



SIM Motor Overcurrent & Stall Cntrs
Start Time: Tue Apr 28 10:51:59 GMT 2026
End Time: Tue Apr 28 10:56:55 GMT 2026

MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
3SMOTOCSIM Motor Overcurrent Cntr
0.00
0.00
10
3SMOTSTLSIM Motor Stall Cntr
0.00
0.00
10



ELECTRICAL DATA
ACIS DPA
Start Time: Tue Apr 28 10:52:18 GMT 2026
End Time: Tue Apr 28 10:57:13 GMT 2026

MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
1DP28AVO - 9day DPA +28V Input A
26.25
0.03
10
1DP28BVO - 9day DPA +28V Input B
26.68
0.02
10
1DPICACU - 9day DPA Input Current A
1.16
0.01
10
1DPICBCU - 9day DPA Input Current B
0.98
0.00
10
DPA A POWER - 9day 1DP28AVO*1DPICACU
30.45
0.26
NA
DPA B POWER - 9day 1DP28BVO*1DPICBCU
26.15
0.02
NA
1DPP0AVO - 9day DPA +5V Analog A
5.25
0.01
10
1DPP0BVO - 9day DPA +5V Analog B
5.23
0.00
10



ACIS DEA
Start Time: Tue Apr 28 10:54:32 GMT 2026
End Time: Tue Apr 28 10:57:0 GMT 2026

DEA A-Side MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
DEA B-Side MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
1DE28AVO - 9day DEA +28V Input A
26.22
0.04
10
1DE28BVO - 9day DEA +28V Input B
26.66
0.05
10
1DEP3AVO - 9day DEA +28V Analog A
30.51
0.02
10
1DEP3BVO - 9day DEA +28V Analog B
0.30
0.00
10
1DEP2AVO - 9day DEA +24V Analog A
24.77
0.02
10
1DEP2BVO - 9day DEA +24V Analog B
0.19
0.02
10
1DEP1AVO - 9day DEA +15V Analog A
15.82
0.01
10
1DEP1BVO - 9day DEA +15V Analog B
0.16
0.00
10
1DEP0AVO - 9day DEA +6V Voltage A
6.17
0.00
10
1DEP0BVO - 9day DEA +6V Voltage B
0.05
0.00
10
1DEN0AVO - 9day DEA -6V Voltage A
-6.29
0.00
10
1DEN0BVO - 9day DEA -6V Voltage B
-0.16
0.00
10
1DEN1AVO - 9day DEA -15V Voltage A
-15.87
0.01
10
1DEN1BVO - 9 day DEA -15V Voltage B
-0.37
0.01
10
1DEICACU - 9 day DEA Input Current A
1.29
0.08
10
1DEICBCU - 9 day DEA Input Current B
0.00
N/A
10
DEA A POWER - 9day 1DE28AVO*1DEICACU
33.82
2.10
NA
DEA B POWER - 9day 1DE28BVO*1DEICBCU
0.00
N/A
N/A

Top

ACIS-AT-A-GLANCE STATUS LIGHTS
HW AND SW LEDS
HW End Time: Tue Apr 28 10:56:46 GMT 2026
SW End Time: Tue Apr 28 10:56:46 GMT 2026
ACIS MECH
End Time: Tue Apr 28 10:56:48 GMT 2026




MSID
1STAT[7654]ST    STATUS -->
1STAT7STRED (0) -> FIFO EmptyGREEN (1) -> FIFO Not Empty
1STAT6STRED (0) -> FIFO FullGREEN (1) -> FIFO Not Full
1STAT5STRED (0) -> BEP Held In ResetGREEN (1) -> BEP Not In Reset
1STAT4STRED (0) -> BEP A SelectedGREEN (1) -> BEP B Selected
MSID
1STAT[3210]ST    STATUS -->
1STAT3STRED (0) -> BEP Code InitializedGREEN (1) -> BEP Code Initializing
1STAT2STRED (0) -> Watchdog BootGREEN (1) -> Normal Boot
1STAT1STRED (0) -> Science ActiveGREEN (1) -> Science Idle
1STAT0ST0 or 1: BEP SW Is RunningBit Toggles Every 64s

MSID
DESCRIPTION
STATUS
1MDBUAONDoor Enable A
1MDBUBONDoor Enable B
1MODRAOPDoor Open Drive A
1MODRBOPDoor Open Drive B
1MCDRACLDoor Close Drive A
1MCDRBCLDoor Close Drive B
1VVDBAONVent Valve Enable A
1VVDBBONVent Valve Enable B
1VVODAOPVent Valve Open Drive A
1VVODBOPVent Valve Open Drive B
1VVCDACLVent Valve Close Drive A
1VVCDBCLVent Valve Close Drive B
1LVDBAONL V Enabled A
1LVDBBONL V Enabled B




















Top

ACIS AT A GLANCE
End Time: Tue Apr 28 10:56:48 GMT 2026
ACIS AT A GLANCE
End Time: Tue Apr 28 10:56:48 GMT 2026



MSID
DESCRIPTION
STATUS
1DPPSAXDPA POWER SUPPLY EN/DIS A
1DPPSADPA POWER SUPPLY ON/OFF A
1DPPSBXDPA POWER SUPPLY EN/DIS B
1DPPSBDPA POWER SUPPLY ON/OFF B
1DEPSAXDEA POWER SUPPLY EN/DIS A
1DEPSADEA POWER SUPPLY ON/OFF A

MSID
DESCRIPTION
STATUS
1DAHTAENDA HTR EN/DIS A
1DAHTAONDA HTR ON/OFF A
1DAHTBENDA HTR EN/DIS B
1DAHTBONDA HTR ON/OFF B
1DABOAENDA BAKE OUT EN/DIS A
1DABOAONDA BAKE OUT ON/OFF A
1DABOBENDA BAKE OUT EN/DIS B
1DABOBONDA BAKE OUT ON/OFF B
1DE28AOCDEA POWER SUPPLY +28V Over-Current Protection
1DE28BOCDEA POWER SUPPLY +28V Over-Current Protection
1DEMVAOCDEA POWER SUPPLY Multi-V Over-Current Protection
1DEMVBOCDEA POWER SUPPLY Multi-V Over-Current Protection
1DPCPAOCDPA POWER SUPPLY Over-Current Protection
1DPCPBOCDPA POWER SUPPLY Over-Current Protection
1DEPSBXDEA POWER SUPPLY EN/DIS B
1DEPSBDEA POWER SUPPLY ON/OFF B
























Top

THERMAL DATA

THERMAL CONTROL DATA: SIDE A and B
Start Time: Tue Apr 28 10:54:34 GMT 2026
End Time: Tue Apr 28 10:57:1 GMT 2026

MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
1CRAT - 9 day Cold Radiator Temp A
-118.35
0.00
10
1CRBT - 9 day Cold Radiator Temp B
306.85
2.51
10
1WRAT - 9 day Warm Radiator Temp A
-79.56
0.00
10
1WRBT - 9day Warm Radiator Temp B
-79.56
0.00
10
1DPAMYT - 9 day DPA -Y Panel Temp (RT810)
10.07
0.05
10
1DPAMZT - 9 day DPA -Z Panel Temp (RT830)
13.67
0.05
10
1DEAMZT - 9 day DEA -Z Panel Temp (RT830)
11.62
0.04
10
1SSPYT - 9 day Suppt Structure +Y Panel Temp (RT810)
13.54
0.00
10
1SSMYT - 9 day Suppt Structure -Y Panel Temp (RT811)
12.88
0.00
10
1PDEAAT - 9 day PSMC DEA Power Supply Temp A
27.93
0.00
10
1PDEABT - 9 day PSMC DEA Power Supply Temp B
18.78
0.68
10
1PIN1AT - 9 day PSMC Temp 1A
71.84
0.00
10
1CBAT - 9 day Camera Body Temp A
-59.89
0.00
10
1CBBT - 9 day Camera Body Temp B
-59.89
0.00
10
1DACTBT - 9 day DA Collimator-Top Temp B
-9.54
0.34
10

ISIM TEMPERATURES
 Start Time: Tue Apr 28 10:54:40 GMT 2026
End Time: Tue Apr 28 10:57:8 GMT 2026

MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
3TSMYDPT - 9 day -Y Shell (facing DPA)
-59.72
0.00
10
3TSPYFET - 9 day +Y Shell (facing HRC)
-34.78
0.00
10
3TSPZDET - 9 day +Z Shell (facing DEA)
10.11
0.00
10
3TSPZSPT - 9 day +Z Shell (facing SS)
-7.34
0.00
10
3TSMXSPT - 9 day -X Shell (facing SS)
-39.77
0.00
10
3TSMXCET - 9 day -X Shell (facing HRC)
-84.66
0.00
10
3RCTUBPT - 9 day +X SIM (RCTU base)
3.99
0.00
10
3TTACS1T - 9 day TT at -Y foot
-5.20
0.00
10
3TTACS2T - 9 day TT at +Y foot
-1.44
0.00
10
3TTACS3T - 9 day TT at +Z foot
-7.71
0.00
10


Top

HEATER DATA
ACIS DA
Start Time: Tue Apr 28 10:52:14 GMT 2026
End Time: Tue Apr 28 10:57:9 GMT 2026

MSID
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
1DAHHAVO - 9 day DA Housing Htr +28V Input A
0.00
0.00
10
1DAHHBVO - 9 day DA Housing Htr +28V Input B
0.00
0.00
10
1DAHAVO - 9 day Detector Assy. Htr Voltage A
0.00
0.00
10
1DAHBVO - 9 day Detector Assy. Htr Voltage B
0.00
0.00
10
1DAHACU - 9 day Detector Assy. Htr Current A
0.00
0.00
10
1DAHBCU - 9 day Detector Assy. Htr Current B
0.00
0.00
10
HTR A POWER - 9day 1DAHAVO*1DAHACU
0.00
NA
NA
HTR B POWER - 9day 1DAHBVO*1DAHBCU
0.00
NA
NA
1DAHAT - 9day Detector Assy. Housing Temp Offset A
21.30
0.45
10
1DAHBT - 9day Detector Assy. Housing Temp Offset B
8.60
0.56
10

Top

MECHANISMS' DATA
ACIS DOOR
Start Time: Tue Apr 28 10:54:34 GMT 2026
End Time: Tue Apr 28 10:57:2 GMT 2026

* MSID *
DESCRIPTION
MEAN VALUE
SIGMA OF THE MEAN
# OF FRAMES
1DACTAT - 9 day Door Angle Potentiometer
68.90
0.00
10
1OAHAT - 9 day Open Actuator Housing Temp A
-22.59
0.00
10
1OAHBT - 9 day Open Acutator Housing Temp B
-27.60
0.00
10
1MAHOATDoor Open Actuator Temp A
440.41
0.93
10
1MAHOBT Door Open Actuator Temp B
441.56
0.76
10
1MAHCATDoor Close Actuator Temp A
440.41
0.93
10
1MAHCBT Door Close Actuator Temp B
436.98
0.00
10


Top

Web Page Designed and Maintained by:
Gregg Germain gregg@head.cfa.harvard.edu

Back   Return to ACIS Operations Team Web Site