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alert_limits.html
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<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US">
<head>
<title>Radiation level information</title>
<style type="text/css">
<!--/* <![CDATA[ */
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body { min-width:900px; background:url('http://asc.harvard.edu/mta/ASPECT/blue_paper.gif'); }
td {
padding-left: 0.3cm;
padding-right: 0.3cm;
}
-->
/* ]]> */-->
</style>
<body>
<h1>Radiation level information</h1>
<h2> RADMON Thresholds</h2>
<pre>
Value Description
---------- ------------------------
MCP B 30 HRC MCP event rate B
SHIELD B 250 HRC Antico Shield rate B
------------ NO LONGER IN RADMON ------------------
P4GM (GOES P4 * 3.3): 300.0
P41GM (GOES P7 * 12): 8.47
</pre>
Note: the units are not specified here but correspond to values normally seen
in telemetry and the Chandra <a href="http://asc.harvard.edu/cgi-gen/mta/Snap/snap.cgi">Snapshot</a>.
<h2> SOT ACE alerts </h2>
<pre>
ACE 115-195 keV proton flux (p/cm2-s-sr-MeV) and fluence (p/cm2-sr-MeV):
SOT alert
Average Flux: (50000) (2-hour fluence/7200)
2-hour Fluence: 3.6E+8
Orbital Fluence: 1.0E+9
Kp: 6.0
</pre>
<h2> Links </h2>
<ul>
<li> <a href="http://cxc.harvard.edu/acis/reb/OnRadiation.html"> ACIS overview of radiation issues</a></li>
<li> <a href="http://occweb.cfa.harvard.edu/occweb/web/fdb_web/2009/FDB_Minutes090305.htm">
FDB: Add HRC MPC-A to RADMON </a> </li>
<li> <a href="http://occweb.cfa.harvard.edu/occweb/web/fdb_web/2008/FDB_Minutes081204.htm">
FDB: Set EPHIN Detector A Failure-mode On and Patch RADMON</a> </li>
<li> <a href="http://cxc.harvard.edu/mta/G13.html ">P4GM and P41GM scaling</a> </li>
<li> <a href="http://occweb.cfa.harvard.edu/occweb/FOT/configuration/procedures/SOP/SOP_OPS_STATE_OF_HEALTH.pdf">RADMON levels reference (Ops SOH SOP Section 10.b)</a> </li>
</ul>
<h2> Form for shift report etc </h2>
<pre>
- EPHIN, HRC and GOES rates
OBSERVED RADMON limit
------------ -------------
MCP B 30
SHIELD B 250
P4GM (GOES P4 * 3.3): (300.0)
P41GM (GOES P7 * 11): (8.47)
- ACE 115-195 keV proton fluences (p/cm2-sr-MeV) and Costello
predicted activity index
OBSERVED SOT alert
------------ -------------
2-hour Fluence: 3.6E+8
Orbital Fluence (CRM): 1.0E+9
Kp: 6.0
</pre>
<hr>
<address><a href="mailto:aldcroft@garth.harvard.edu">Tom Aldcroft</a></address>
<!-- Created: Thu Jul 13 12:29:29 EDT 2000 -->
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Last modified: Thu Dec 09 17:55:46 EDT 2010
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</body>
</html>