12.16 Cycle 28 Calibration Program
The Cycle 28 calibration plans for COS continue the routine calibration and monitoring programs performed in previous Cycles. Brief descriptions of the programs are listed in Table 12.2. The full calibration plan for Cycle 28 is listed in Table 12.19. Two new contingency programs are introduced for this cycle and are included in the table below. The program COS FUV Change in Spectroscopic Sensitivity Trends is a supplement to the COS FUV Spectroscopic Sensitivity Monitor and is activated when the time-dependent sensitivity appears to be changing on short timescales. The COS FUV Characterization of Modal Gain When Changing High Voltage program is activated when the high voltage of the FUV detector is changed. In previous cycles, these contingency orbits were included in the COS FUV Spectroscopic Sensitivity Monitor and COS FUV Detector Gain Maps programs, respectively.
The program also included exploratory, enabling, and calibration programs designed to facilitate the move to Lifetime Position 5 (LP5); they are listed in Table 12.20. In addition, this program also included exploratory programs designed to facilitate the move to Lifetime Position 6 (LP6); they are listed in Table 12.21.
Table 12.19: Cycle 28 Calibration Programs.
| Program Name | Program ID |
|---|---|
Cycle 28 COS NUV MAMA Fold Distribution | 16328 |
Cycle 28 COS NUV Detector Dark Monitor | 16237 |
Cycle 28 COS NUV Spectroscopic Sensitivity Monitor | 16329 |
Cycle 28 COS NUV Wavelength Scale Monitor | 16330 |
Cycle 28 COS NUV Target Acquisition Monitor | 16331 |
Cycle 28 COS FUV Detector Gain Maps | 16323 |
Cycle 28 COS FUV Detector Dark Monitor | 16322 |
Cycle 28 COS FUV Spectroscopic Sensitivity Monitor | 16324 |
Cycle 28 COS FUV Wavelength Scale Monitor | 16325 |
| Cycle 28 COS FUV Target Acquisition Monitor | 16326 |
| Cycle 28 COS FUV Change in Spectroscopic Sensitivity Trends* | 16332 |
| Cycle 28 COS FUV Characterization of Modal Gain When Changing High Voltage* | 16333 |
*contingency program
Table 12.20: Lifetime Position 5 Calibration Program.
| I. Optimize the New Lifetime Position | Program ID |
| COS/FUV Mapping of FCA Light Leak Between +5'' and +6''^ | 15689 |
| Testing for Systematics When Moving the COS Aperture Block* | 16052 |
| Initial Test of COS/FUV Spectrum Placement at Lifetime Position 5* | 16106 |
| II. Enable Science at the New Lifetime Position | |
| Verification of Target Placement for COS at LP5 | 16430 |
| Focus Sweep Program for COS FUV Observations at LP5 and LP3 | 16431 |
| COS LP5 FUV Target Acquisition Enabling and Verification | 16432 |
| III. Calibrate the New Lifetime Position | |
| COS FUV LP5 Calibration: Profiles, Traces, Sensitivities, Flat Fields and Spatial Resolution | 16466 |
| COS FUV LP5 Calibration: Spectral Resolution | 16467 |
| COS FUV LP5 Calibration: Dispersion Solutions | 16468 |
| COS FUV LP5 Calibration: Lamp Templates | 16469 |
| COS FUV LP5 Calibration: Bright Object Aperture Performance | 16470 |
| COS FUV LP5 Calibration: Gain Maps | 16471 |
^program executed in Cycle 26
*program executed in Cycle 27
Table 12.21: Lifetime Position 6 Exploratory Program.
| Program Name | Program ID |
|---|---|
| COS/FUV Gain Map and Aperture Placement at LP6 | 16472 |
| FUV Focus Sweep Exploratory Program for COS at LP6 | 16491 |
| FUV Exploratory Spectral Resolution Program at LP6 | 16495 |
If your program requires calibrations beyond those described here, then you should explicitly include this calibration in your Phase I proposal.
-
COS Instrument Handbook
- Acknowledgments
- Chapter 1: An Introduction to COS
- Chapter 2: Proposal and Program Considerations
- Chapter 3: Description and Performance of the COS Optics
- Chapter 4: Description and Performance of the COS Detectors
-
Chapter 5: Spectroscopy with COS
- 5.1 The Capabilities of COS
- • 5.2 TIME-TAG vs. ACCUM Mode
- • 5.3 Valid Exposure Times
- • 5.4 Estimating the BUFFER-TIME in TIME-TAG Mode
- • 5.5 Spanning the Gap with Multiple CENWAVE Settings
- • 5.6 FUV Single-Segment Observations
- • 5.7 Internal Wavelength Calibration Exposures
- • 5.8 Fixed-Pattern Noise
- • 5.9 COS Spectroscopy of Extended Sources
- • 5.10 Wavelength Settings and Ranges
- • 5.11 Spectroscopy with Available-but-Unsupported Settings
- • 5.12 FUV Detector Lifetime Positions
- • 5.13 Spectroscopic Use of the Bright Object Aperture
- Chapter 6: Imaging with COS
- Chapter 7: Exposure-Time Calculator - ETC
-
Chapter 8: Target Acquisitions
- • 8.1 Introduction
- • 8.2 Target Acquisition Overview
- • 8.3 ACQ SEARCH Acquisition Mode
- • 8.4 ACQ IMAGE Acquisition Mode
- • 8.5 ACQ PEAKXD Acquisition Mode
- • 8.6 ACQ PEAKD Acquisition Mode
- • 8.7 Exposure Times
- • 8.8 Centering Accuracy and Data Quality
- • 8.9 Recommended Parameters for all COS TA Modes
- • 8.10 Special Cases
- Chapter 9: Scheduling Observations
-
Chapter 10: Bright-Object Protection
- • 10.1 Introduction
- • 10.2 Screening Limits
- • 10.3 Source V Magnitude Limits
- • 10.4 Tools for Bright-Object Screening
- • 10.5 Policies and Procedures
- • 10.6 On-Orbit Protection Procedures
- • 10.7 Bright Object Protection for Solar System Observations
- • 10.8 SNAP, TOO, and Unpredictable Sources Observations with COS
- Chapter 11: Data Products and Data Reduction
-
Chapter 12: The COS Calibration Program
- • 12.1 Introduction
- • 12.2 Ground Testing and Calibration
- • 12.3 SMOV4 Testing and Calibration
- • 12.4 COS Monitoring Programs
- • 12.5 Cycle 17 Calibration Program
- • 12.6 Cycle 18 Calibration Program
- • 12.7 Cycle 19 Calibration Program
- • 12.8 Cycle 20 Calibration Program
- • 12.9 Cycle 21 Calibration Program
- • 12.10 Cycle 22 Calibration Program
- • 12.11 Cycle 23 Calibration Program
- • 12.12 Cycle 24 Calibration Program
- • 12.13 Cycle 25 Calibration Program
- • 12.14 Cycle 26 Calibration Program
- • 12.15 Cycle 27 Calibration Program
- • 12.16 Cycle 28 Calibration Program
- • 12.17 Cycle 29 Calibration Program
- • 12.18 Cycle 30 Calibration Program
- • 12.19 Cycle 31 Calibration Program
- Chapter 13: COS Reference Material
- • Glossary