CXC Manager’s Status Report
Chandra User Committee Meeting
Roger J. Brissenden
25 June 2002
Program Level Status
•
•
•
•
•
•
•
•
•
Spacecraft continues to perform superbly and operations continue to be
routine. No significant spacecraft hardware problems or safe modes have
occurred since last report.
Flight software patch to mitigate EPHIN hardware failure flag glitch running
SCS 107.
827 Cycle 4 proposals (817 GO, 10 GTO) submitted by deadline of 3/15/02.
Peer Review held on schedule June 18-20.
Plan agreed to with MSFC and HQ on adding resources in the Ed/Outreach
area to provide additional emphasis on SSUs.
CXC Quarterly review 4/23/02. No major actions resulted from the review.
MSFC Independent Annual Review to be held 9/5/02.
Contract change in work to direct SAO to perform call for proposals in place
of NRA – similar to HST model.
CXC Contract extension proposal for 11-months from 9/30/02 to 8/31/03 in
final sign-off with MSFC.
MSFC is pursuing a JOFOC approach for contract post 8/31/03. Second 5-year
budget level briefing given to HQ as part of POP-02.
No significant near-team budget or staffing issues. Out-year profile in work
with HQ.
25 June 2002
CXC Status Report/CUC
Page 2
Items from January 02 CUC
• “Occasionally a few datasets are delivered well beyond the mean lag
of 7 days. We suggest that each OBSID has a built-in alarm so that the
appropriate scientists are informed when an OBSID has been unduly
delayed.”
The archive group has installed a script which checks the automated
processing (AP) status for observations which have been in the queue for a
week or more. The duty scientist is notified of all such observations. In
addition DS has implemented monthly manual checks of the AP status
tables for observations which have been received but for which processing
has not completed.
• “We recommend that more channels be opened by which either the
Director or the CXC Outreach office can learn of potentially
interesting results. Possibilities include charging CUC members to
take some responsibility for identifying potentially appropriate science
results and sensitizing PIs of successful large proposals of this issue.”
The CXC has reached agreement on a plan with MSFC and HQ to
increase the resources in the Education and Public Outreach area. An
important task for the new resources will be to address this issue.
25 June 2002
CXC Status Report/CUC
Page 3
Operations
• Nominal Spring 2002 eclipse season.
• Patch up-linked to increase glitch counters and mitigate EPHIN
hardware failure glitch counter trips of SCS 107 (second occurrence on
4/2/02 however EPHIN hardware is nominal and cause traced to subtle
timing condition).
• Successful test of bright earth constraint limitation. Expected to lead to
reduction of the 20 degree constraint yielding more flexible
scheduling.
• 6 executions of SCS 107 due to high solar activity, 1 assessed as due
to EPHIN hardware failure glitch.
– No ACIS CTI degradation above expectations.
• Anomalies
– None.
• Hosted a number of visits or discussions with other mission teams:
– NGST, SIRTF, Kepler, SIM, HST (July).
25 June 2002
CXC Status Report/CUC
Page 4
Operations
• Load interrupt TOOs
Date
3/3/02
3/11/02
3/12/02
3/28/02
4/5/02
4/5/02
5/10/02
6/3/02
Target
NGC 4388
RX J170930.2-2639
SN2002B0
GRB020321
GRB020405
XTE J1751-305
XTE J0929-314
GRB020531
Request
1 day
3 days
3 days
3 days
1 day
3 day
3 days
3 day
• Operations Ground System Updates
Date
2/27/02
5/2/02
5/2/02
6/12/02
25 June 2002
Version
ONLS 3.8.2
OFLS 9.2B
GRETA 1.2.2
OFLS 9.3
Change
New front end processor file interface
Major update of momentum management
Plot bug fix
Interface to AGASC 1.5 (starcat update)
CXC Status Report/CUC
Page 5
MUPS Fuel Usage
MUPS fuel remaining (Lb mass)
57.2
Avg usage rate = 1.31 lbm/yr
Yrs remaining ~ 44.5 (MUPS fuel only)
~ 143.8 (MUPS + IPS)
57.0
56.8
56.6
56.4
56.2
56.0
55.8
55.6
May01 Jun01
25 June 2002
Jul01
Aug01 Sep01 Oct01 Nov01 Dec01 Jan02
CXC Status Report/CUC
Feb02 Mar02 Apr02
Page 6
MUPS Warm Start Count
350
300
MUPS Warm Starts
250
10 year Qual
Warm Starts
15 year Qual
Warm Starts
Actual Warm
Starts
200
150
100
50
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
Mission Elapsed Time (Years)
25 June 2002
CXC Status Report/CUC
Page 7
Scheduled Observing Efficiency
0.80
0.70
Scheduled Efficiency
0.60
0.50
0.40
0.30
0.20
0.10
0.00
May-01
Jun-01
25 June 2002
Jul-01
Aug-01
Sep-01
Oct-01 Nov-01 Dec-01
CXC Status Report/CUC
Jan-02
Feb-02 Mar-02 Apr-02
Page 8
Cumulative Observations for NRA-3
Cumulative Observations for NRA-3
Cumulative observing time (ks)
25,000
20,000
15,000
Non-cal approved
Non-cal scheduled
10,000
Cal sched
5,000
0
Nov-02
Oct-02
Sep-02
Aug-02
Jul-02
CXC Status Report/CUC
Jun-02
May-02
Apr-02
Mar-02
Feb-02
Jan-02
Dec-01
Nov-01
25 June 2002
Page 9
Data Systems
• Data processing
– Average time from observation to data delivery has been maintained at
approximately a week
• Data System Software Releases (major)
Date
2/6/02
3/22/02
6/14/02
25 June 2002
Release Content includes
DS 6.6 NRA4 Budget software
WebChaSeR fixes, MTA alerts
DS 6.7 New SUN cc compiler
SI mode, data base and HRC processing updates
DS 6.8 Solaris 8 port of data system.
CXC Status Report/CUC
Page 10
Data Delivery Effectiveness
5.4 DATA DELIVERY EFFECTIVENESS
Data delivery effectiveness = time from observation to data accessibility announced to user via automatic or custom
processing. Reported for GO, GTO and TOO observations with delivered data (excludes calibration observations and nonastronomical measurements). Valid as of 8 May 2002.
Requirements: The CXC is required to deliver data to observers within 7 days of the end of an observation. This is
understood to refer to the time from receipt of data at the Operations Command Center (OCC). The Deep Space Network is required
to deliver data to the OCC within 24 hours of a data transfer from the spacecraft.
As of middle of following month
Month
Number of Days to Data Delivery Number
Obs
Deliv
Min
Avg
Max
As of 5/8/02
Number
Outstanding
Number
Deliv
Number
Outstanding
May-01
Jun-01
Jul-01
Aug-01
Sep-01
Oct-01
Nov-01
Dec-01
48
61
123
59
51
46
42
56
3
3
2
2
4
3
1
1
8
9
7
9
9
7
6
7
17
29
17
30
30
20
11
13
45
53
118
51
46
34
42
55
3
8
5
8
5
12
9
1
48
61
123
59
51
46
42
55
0
0
0
0
0
0
0
0
Jan-02
Feb-02
Mar-02
Apr-02
56
51
68
57
2
2
1
1
8
10
6
6
21
27
15
29
54
51
63
57
2
0
5
0
56
51
67
57
0
0
1
0
25 June 2002
CXC Status Report/CUC
Obsids Outstanding
(see following page for details)
2734 - reobserved as 3433 on 2/3/02
3471
Page 11
Chandra Grant Awards
CXC GO Data Distribution (# Of Days from Data Distribution to Aw ard )
January 1, 2002 to April 8, 2002
150
# of Days
125
100
75
50
25
0
4/1
3/17
3/2
2/15
1/31
1/16
1/1
Data Distribution Date
SAO Days to Award
25 June 2002
Outstanding Awards
CXC Status Report/CUC
MSFC Days to Award
Page 12