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Last modified: 07/01/22

CXC/ACIS Operations

Welcome to our home page. ACIS, the Advanced CCD Imaging Spectrometer, is an instrument built by a team of scientists and engineers from the Massachusetts Institute of Technology's Center for Space Research and the Pennsylvania State University for the Chandra X-Ray Observatory. ACIS shares the Chandra focal plane with the High Resolution Camera. However, what you will find here is contact information and other resources relevant to the Chandra X-ray Observatory Center (CXC) ACIS Operations team members.

ACIS Operations Scientist On-Duty Schedule

Please consult the following table to determine the ACIS Operations scientist on-duty to contact for mission planning purposes or spacecraft emergencies:


Week Of Scientist Work Cell
Jun 29 - Jul 3 John ZuHone 6-1816 781-708-5004
Jul 4 - Jul 10 Jack Steiner 6-7988 617-680-9306
Jul 11 - Jul 17 Catherine Grant 253-0797 617-584-2686
Jul 18 - Jul 24 John ZuHone 6-1816 781-708-5004
Jul 25 - Jul 31 Gregg Germain 6-1558 617-785-0976
Aug 1 - Aug 7 Jack Steiner 6-7988 617-680-9306
Aug 8 - Aug 14 Catherine Grant 253-0797 617-584-2686
Aug 15 - Aug 21 John ZuHone 6-1816 781-708-5004
Aug 22 - Aug 29 Gregg Germain 6-1558 617-785-0976
Aug 30 - Sep 4 Jack Steiner 6-7988 617-680-9306
Sep 5 - Sep 11 Catherine Grant 253-0797 617-584-2686
Sep 12 - Sep 18 John ZuHone 6-1816 781-708-5004

Contact and Leave Information

Operations Memos, Documents and Links

Non-Load Event Tracking

ACIS Thermal

ACIS Procedures


ACIS Orbital Fluence

Real-Time Telemetry Links

Current MP Schedules


Shift Reports

Related ACIS and Chandra Web Sites:

Solar Cycle Info
Solar Cycle data and predictions

Solar Cycle 25 prediction article

Spacecraft Configuration and Constants

Standard Dither Pattern

IP&CL - P014

Latest IP&CL - P015

Web Page Maintained by:
Gregg Germain, Paul Plucinsky, John ZuHone, & Jack Steiner
(Please feel free to send us any comments or suggestions!)

The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory.
60 Garden Street, Cambridge, MA 02138 USA.    Email: cxcweb@head.cfa.harvard.edu
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