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From: kuntz@pha.jhu.edu
Subject: Radiation Monitor Data Compression
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2 followups: 1 2

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Date: Fri, 21 Mar 2014 01:23:35 GMT
From: kuntz@pha.jhu.edu
To: xmmhelp@sciops.esa.int
CC: kuntz@pha.jhu.edu
Subject: Radiation Monitor Data Compression
Full_Name: Kip Dee Kuntz
Submission from: (NULL) (71.166.113.20)


Dear Help Desk,

We are trying to use the ERM data files, in particular the *_SLOW_ECE.FIT and
*_FAST_ECE.FIT files. The XMM Data Files Handbook states that the NLEO, NLE1,
NLE2, NHE0, NHE1, NHE2, and NHEC columns are compressed with a
pseudo-logarithmic compression method. There is then a hot link to 
http://xmm2.esac.esa.int/external/xmm_obs_info/radmon/radmon_details/
which does not actually contain that information. I believe that the information
is held in XMM-CES-UM-001 (EPIC Radiation Monitor User Manual) but I have not
been able to find a copy of it.
Could you please send me a link to something that does explain the
pseudo-logarithmic data compression method? 

Thanks very much,
K.D.Kuntz


Reply 1

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From: Matthias Ehle <xmmhelp@sciops.esa.int>
To: kuntz@pha.jhu.edu
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Date: Fri Mar 21 14:40:28 2014
Dear Kip,

I am going to send an excerpt of the RM User Manual with the relevant
information 
from my private account (that allows me to send attachments).

We plan to put this info also on the Radmon webpage in the near future.

Let us know, via xmmhelp, in case any further details are needed.

Regards,
  Matthias 



Followup 1

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Date: Fri, 21 Mar 2014 23:58:32 -0400
From: "K. D. Kuntz" <kuntz@pha.jhu.edu>
To: Matthias Ehle <xmmhelp@sciops.esa.int>
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Dear Matthias,

   Thank you very much! I implemented the decompression and the numbers 
in the ECE files now track the posted plots much more closely, though 
there are still some smaller discrepancies.
   Please also note that the radiation monitor files for rev 2300 are 
missing their time columns. (This may already be know, but I didn't 
happen to see it in the list of revs with problems.
   This work is actually part of a quick exercise that a heliophysicist 
and I are doing to try to understand the soft proton flares. We may have 
something of interest for the IACHEC meeting.

Thank you again,
K.

On 3/21/14 10:40 AM, Matthias Ehle wrote:
> Dear Kip,
>
> I am going to send an excerpt of the RM User Manual with the relevant
> information
> from my private account (that allows me to send attachments).
>
> We plan to put this info also on the Radmon webpage in the near future.
>
> Let us know, via xmmhelp, in case any further details are needed.
>
> Regards,
>    Matthias
>
>
>
> This message and any attachments are intended for the use of the addressee
or addressees only.
> The unauthorised disclosure, use, dissemination or copying (either in whole
or in part) of its
> content is not permitted.
> If you received this message in error, please notify the sender and delete
it from your system.
> Emails can be altered and their integrity cannot be guaranteed by the
sender.
>
> Please consider the environment before printing this email.



Reply 2

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From: Matthias Ehle <xmmhelp@sciops.esa.int>
To: kuntz@pha.jhu.edu
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Date: Mon Mar 24 09:31:43 2014
Dear Kip,

could you be a bit more specific about the discrepancies, i.e. do you 
think they are significant? Maybe you can send us a plot? 

Wrt rev 2300: We will try to recover the old raw data. To help our
analysis, please still let us know if the missing columns are in the 
Time Correlated Radmon data (it might be a problem with the SAS task 
that correlates the data or in the TCX file for the same revolution).

Thanks,
  Matthias


Followup 2

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Date: Mon, 24 Mar 2014 09:49:18 -0400
From: "K. D. Kuntz" <kuntz@pha.jhu.edu>
To: Matthias Ehle <xmmhelp@sciops.esa.int>
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Dear Matthias,

The discrepancies have been resolved; in a log plot a stray factor of 
four can produce visible changes in some places and not others. So that 
item is now closed.
The Rev 2300 files (both FAST and SLOW, both ECE and ESE) are missing 
the Time, MJD, and Timecal columns.

Thank you very much for your help with this,
K.

On 3/24/14 5:31 AM, Matthias Ehle wrote:
> Dear Kip,
>
> could you be a bit more specific about the discrepancies, i.e. do you
> think they are significant? Maybe you can send us a plot?
>
> Wrt rev 2300: We will try to recover the old raw data. To help our
> analysis, please still let us know if the missing columns are in the
> Time Correlated Radmon data (it might be a problem with the SAS task
> that correlates the data or in the TCX file for the same revolution).
>
> Thanks,
>    Matthias
>
> This message and any attachments are intended for the use of the addressee
or addressees only.
> The unauthorised disclosure, use, dissemination or copying (either in whole
or in part) of its
> content is not permitted.
> If you received this message in error, please notify the sender and delete
it from your system.
> Emails can be altered and their integrity cannot be guaranteed by the
sender.
>
> Please consider the environment before printing this email.



Reply 3

Resend
From: Matthias Ehle <xmmhelp@sciops.esa.int>
To: kuntz@pha.jhu.edu
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Date: Mon Mar 24 16:02:01 2014
Dear Kip,

thanks, we are going to re-process the Radmon data from the existing 
raw data; likely we have an issue with the current Time Correlation file;

I let you know hen I have further new.

Cheers,
  Matthias


Reply 4

Resend
From: Matthias Ehle <xmmhelp@sciops.esa.int>
To: kuntz@pha.jhu.edu
Subject: Re: Radiation Monitor Data Compression (PR#73835)
Date: Tue Oct 28 10:19:27 2014
Dear Kip,

(in case the info has not reached you yet... )

We like to inform that Radmon data for up to rev 2699 has been
updated a few week ago. During this update we also re-generated 
revs 1987 (related to another Helpdesk question) and 2300.

Regards,
  Matthias 

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