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Last modified: 10/22/16

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
Oct 14 - Oct 23 Gregg Germain 6-1558 617-785-0976
Oct 24 - Oct 30 Paul Plucinsky 6-7726 617-721-4366
Oct 31 - Nov 6 Richard Edgar 5-7249 617-866-8615
Nov 7 - Nov 13 John ZuHone 6-1816 781-708-5004
Nov 14 - Nov 20 Catherine Grant 253-0797 617-584-2686
Nov 21 - Nov 27 Gregg Germain 6-1558 617-785-0976
Nov 28 - Dec 4 Richard Edgar 5-7249 617-866-8615
Dec 5 - Dec 11 John ZuHone 6-1816 781-708-5004
Dec 12 - Dec 18 Catherine Grant 253-0797 617-584-2686
Dec 19 - Dec 25 Paul Plucinsky 6-7726 617-721-4366
Dec 26 - Jan 1 Gregg Germain 6-1558 617-785-0976
Jan 2 - Jan 8 Richard Edgar 5-7249 617-866-8615
Jan 9 - Jan 15 John ZuHone 6-1816 781-708-5004
Jan 16 - Jan 22 Catherine Grant 253-0797 617-584-2686


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

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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