OGIP Calibration Memo CAL/AR5/95-007

Ariel-V
CALIBRATION FILES
IN THE OGIP CALDB

Ariel-V CALIBRATION FILES IN THE OGIP CALDB






edited by:
Laura Whitlock,
Jim Lochner,
Ian M George
& Ron S Zellar
HEASARC
Codes 664 & 668,
NASA/GSFC,
Greenbelt, MD20771
Last Update: 1995 Mar 09
(by IMG)





SUMMARY

The Ariel-V calibration datasets currently in the OGIP caldb are described.
Intended audience: HEASARC Support Scientists, OGIP programmers and authors of data analysis s/w.

LOG OF SIGNIFICANT CHANGES


Release Sections Changed Brief Notes
Date
1995 Feb 27 All First Draft
2006 Aug 01 All made compatible with tth; updated links

Chapter 1
INTRODUCTION

1.1  Overview

This document is intended to provide notes on the origin, format, limitations etc of all Ariel-V calibration datasets within the OGIP calibration database (caldb).
In the rest of this chapter, the location and structure of the OGIP caldb at NASA/GSFC is briefly described, along with references to other relevant documentation.
All Ariel-V Experiments A through G datasets within the caldb at NASA/GSFC are summarized in Chapters  through , with non-instrument specific datasets summarized in Chapter .

1.2  The OGIP Caldb at NASA/GSFC

The location, organization and contents of the OGIP caldb on-line at NASA/GSFC is summarized in OGIP Calibration Memo CAL/GEN/93-006 (available on-line as portable document format (PDF) and html versions).

1.2.1  Physical Location

The OGIP calibration database OGIP calibration database (caldb) is physically located at the Exploration of the Universe Division at NASA/GSFC.
The entire caldb directory tree is available to remote users via anonymous ftp or http.
Within the OGIP, the caldb has been remote mounted on all other machines and the symbolic links /caldb & /CALDB created to point to the above top level directory.

1.2.2  Basic Structure

The contents of the /caldb area is sub-divided between the following sub-directory trees: Here we only consider the data tree. It should be noted that access to certain caldb directory trees is also available from other areas of the legacy anonymous ftp account via symbolic links (see CAL/GEN/93-006, available on-line as postscript and html versions).

1.2.3  Calibration Data File Classes

The OGIP caldb classifies files as `Primary Calibration Files', `Basic Calibration Files' and `Calibration Product Files' (PCFs, BCFs & CPFs respectively; see also CAL/GEN/91-001, available on-line as postscript and html versions). PCFs are 'raw' ground and in-orbit calibration datasets not of immediate interest to most users as they are not directly required for (all but the most specialized) scientific data analysis tasks. These dataset are not considered here. BCFs contain the lowest level calibration datasets potentially required by downstrem software, and can be considered the `atomic units' of the instrument calibration. CPFs contain `convolutions' of the information stored within BCFs customized for a specific analysis task and/or scientific observation.
All BCF & CPF calibration files are organized using the scheme
/caldb/data/mission/inst
where mission & inst are the OGIP-standard names for the mission and instrument. For internal management purposes, a further division into inst/bcf and inst/cpf sub-directories is made in most cases. Non-instrument specific calibration datasets, including general spacecraft housekeeping information etc, can be found in the /caldb/data/mission/mis sub-directory.

1.3  Conventions used within this Document

Throughout this document, the hash (#) symbol is used as a wild-card in filenames to indicate several files are available with slightly different names. In all cases the detailed naming scheme, along with the characters which can be used to replace the # are described in the detailed description of the file set.

1.4  Acknowledgments

The information within this document is based upon that in Appendix A of versions of the Ariel-V ASM Calibration Guide prior to 1994 Feb 27. The Ariel-V ASM Calibration Guide was written by Laura Whitlock, Jim Lochner & Ian M George, and is available on-line as postscript and html versions. Appendix A has been removed from the Ariel-V ASM Calibration Guide and is effectively replaced by this document.

Chapter 2
Ariel-V Expt A CALIBRATION FILES

2.1  Summary of Available Files

The Expt A calibration files available under the
/caldb/data/ariel5/exptA/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 2.1: Summary of Ariel-V Expt A calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 3
Ariel-V Expt B (SSI) CALIBRATION FILES

3.1  Summary of Available Files

The Expt B calibration files available under the
/caldb/data/ariel5/ssi/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 3.1: Summary of Ariel-V Expt B (SSI) calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 4
Ariel-V Expt C CALIBRATION FILES

4.1  Summary of Available Files

The Expt C calibration files available under the
/caldb/data/ariel5/exptC/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 4.1: Summary of Ariel-V Expt C calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 5
Ariel-V Expt D CALIBRATION FILES

5.1  Summary of Available Files

The Expt D calibration files available under the
/caldb/data/ariel5/exptD/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 5.1: Summary of Ariel-V Expt D calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 6
Ariel-V Expt F CALIBRATION FILES

6.1  Summary of Available Files

The Expt F calibration files available under the
/caldb/data/ariel5/exptF/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 6.1: Summary of Ariel-V Expt F calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 7
Ariel-V Expt G (ASM) CALIBRATION FILES

7.1  Summary of Available Files

The Expt G calibration files available under the
/caldb/data/ariel5/asm/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 7.1: Summary of Ariel-V Expt G (ASM) calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

Chapter 8
Ariel-V MISCELLANEOUS CALIBRATION FILES

8.1  Summary of Available Files

The miscellaneous non-instrument specific & s/c-related calibration files available under the
/caldb/data/ariel5/mis/type
directory tree are listed in Table . In many cases the actually files will be stored in sub-directories under this tree, as detailed in the corresponding detailed description.
Table 8.1: Summary of Ariel-V MIS calibration files available within the OGIP Caldb

Filename Description Section
Basic Calibration Files (type = bcf)
None
Calibration Product Files (type = cpf)
None

USEFUL LINKS TO OTHER HTML PAGES

The following useful links are available


File translated from TEX by TTH, version 3.84.
On 7 May 2010, 15:52.