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Last modified: 03/30/17

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
Mar 27 - Apr 2 Gregg Germain 6-1558 617-785-0976
Apr 3 - Apr 8 Richard Edgar 5-7249 617-866-8615
Apr 9 - Apr 9 Catherine Grant 253-0797 617-584-2686
Apr 10 - Apr 16 Paul Plucinsky 6-7726 617-721-4366
Apr 17 - Apr 23 Catherine Grant 253-0797 617-584-2686
Apr 24 - Apr 30 Gregg Germain 6-1558 617-785-0976
May 1 - May 7 Richard Edgar 5-7249 617-866-8615
May 8 - May 14 Paul Plucinsky 6-7726 617-721-4366
May 15 - May 21 Catherine Grant 253-0797 617-584-2686
May 22 - May 28 Gregg Germain 6-1558 617-785-0976
May 29 - Jun 4 Richard Edgar 5-7249 617-866-8615
Jun 5 - Jun 11 John ZuHone 6-1816 781-708-5004


The first highlighted name is responsible for Load Reviews and any real-time commanding. The second highlighted name is responsible for SW command packet/PB generation and SI-MODE allocations (via the USINT web pages).

Contact and Leave Information

Operations Memos, Documents and Links

ACIS Thermal Models

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
Spacecraft Constants
Standard Dither Pattern
Web Page Maintained by:
Gregg Germain, Paul Plucinsky, Richard Edgar, & Royce Buehler
(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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