SWS Instrument & Data Manual
Issue 1.0
SAI/98-095/Dc

K. Leech
ISO Science Operations, VILSPA
with contributions from
the SWS Instrument Dedicated Team (SIDT)
and
the SWS Instrument Support Team (SIST)

• Contents
• 1. Introduction
  • 1.1 Purpose
  • 1.2 How to use this manual
  • 1.3 What's new
  • 1.4 How to contact ESA or other institutes
  • 1.5 Relevant documents
• 2. Processing SWS Data
  • 2.1 Introduction
  • 2.2 Reading the data from CD-ROM
  • 2.3 Basic processing steps
  • 2.4 Having a quick-look at the data
  • 2.5 Selecting data
  • 2.6 Using Detector Redundancy
  • 2.7 Join AOT bands together
  • 2.8 Smoothing and Rebinning data
  • 2.9 Current Caveats on SWS Data Products
• 3. Instrument overview
  • 3.1 Introduction
  • 3.2 The Instrument
  • 3.3 Entrance Apertures
  • 3.4 SWS Detectors and operation
• 4. AOT overview
  • 4.1 AOT Introduction
  • 4.2 AOT 1
  • 4.3 AOT 2
  • 4.4 AOT 6
  • 4.5 AOT 7
  • 4.6 AOT behaviour
• 5. Instrumental Characteristics
  • 5.1 Introduction
  • 5.2 Grating Performance Overview
  • 5.3 Fabry-Pérot Overview
  • 5.4 Detector Noise & Dark Current
  • 5.5 Detector Response
  • 5.6 Behaviour around a reset
  • 5.7 Glitches
  • 5.8 Memory effects
  • 5.9 Reference Scan Memory Effects
  • 5.10 Effects of pointing accuracy
  • 5.11 Grating instrumental profile and resolution
  • 5.12 Single Detector Signal Jumps
  • 5.13 Light leakage in band 3D
  • 5.14 CAM CVF & SWS
  • 5.15 Diffuse Background Emission
• 6. The RSRF and Effect of Fringes
  • 6.1 Introduction
  • 6.2 The RSRF calibration
  • 6.3 RSRF Calibration sources and model sources
  • 6.4 Differences between lab RSRF and in-orbit RSRF
  • 6.5 What can go wrong when dividing by the RSRF?
  • 6.6 Spurious Narrow Spectral Features
  • 6.7 Overview of the RSRF curves
• 7. SWS Calibration
  • 7.1 Introduction
  • 7.2 Overall Calibration
  • 7.3 Flux calibration
  • 7.4 Flux calibration accuracy
  • 7.5 Wavelength calibration
  • 7.6 Wavelength calibration accuracy
• 8. The Pipeline and its effects
  • 8.1 Introduction
  • 8.2 ERD to SPD (Derive-SPD)
  • 8.3 SPD to AAR (Auto-Analysis)
  • 8.4 The Error Propagation of the SWS Pipeline
  • 8.5 Glitch removal effects in fast speed AOT 1 observations
  • 8.6 Version history of the SPG pipeline
• 9. Product Description
  • 9.1 Introduction
  • 9.2 Raw data files (ERD and Compact Status)
  • 9.3 Standard processed (SPD) files
  • 9.4 Auto-Analysis Results (AAR) files
  • 9.5 Calibration-G files
• 10. Products sorted by AOT
  • 10.1 AOT 1, Low Resolution Full Grating Scan
  • 10.2 AOT 2, Grating Line Profile Scan
  • 10.3 AOT 6, Grating Scan
  • 10.4 AOT 7, Combined Fabry-Pérot Line Scan and SW Grating Scan
• A. List of Acronyms and Symbols
• Index