STScI Logo

Hubble Space Telescope
Phase I: 11893

COS Cycle-17 Calibration Phase-1 Template

Last Revised: 
Proposal ID: 11893
Title: FUV Detector Recovery after Anomalous Shutdown
PI: T. Wheeler
Co-I(s): A. Welty (STScI)
---------------------------------------------------------------------------
# Orbit estimates are TOTAL for all of cycle-17; assume 4 weeks 
# 01 March 2009, 01 September 2009, 01 March 2010

Total Prime Orbits:                  0
External Parallel Orbits:            0
Internals or no-impact orbits:       2
Comments on orbit estimate:          Execute when needed
---------------------------------------------------------------------------
# This section should be written with a GO audience in mind -- use 
# Calibration plans in WFPC-2 handbook as a guide.

Purpose:  Recover FUV detector using high voltage rampup in several cycles, 
          ending up with nominal high-voltage rampup, and obtain 
          diagnostics needed to check health during rampup.

                                      
Description:  Turn on and ramp up the FUV high voltage in a conservative 
              manner. Details are to be determined during SMOV, but this is 
              a summary: Initial transition from Operate to HVLow is broken 
              into two parts, with a time gap between turning on the HV and 
              ramping to the HVLow (SAA) voltage. This will be followed by 
              3 cycles of HV ramp-up and return to HVLow. Cycles will ramp 
              up to successively higher (magnitude) voltage, with the last 
              cycle going to the nominal operating values. There will be a 
              time gap between cycles.


               
Accuracy:  N/A

Comments on Accuracy:  
     
Products:  TIR



---------------------------------------------------------------------------
# THE REST OF THIS FORM IS FOR INTERNAL USE
---------------------------------------------------------------------------
# Target information (copy for each target)

Target Name.............................: DARK	
RA.............................................: n/a 		
Dec...........................................: n/a		
Flux (and units)........................: n/a	
Visibility window (if known or relevant): n/a
Comment on choice of target: n/a

# Table of exposures (copy for each exposure):

Target or lamp..........................: 
Type of Acquisition.....................: 
Detector for observation................: 
Operating mode .........................: 
Spectral Element........................: 
Aperture................................: 
Central Wavelength......................: 
Exposure Time...........................: 
Number of Iterations ...................: 
BOP Predicted Local Count Rate for MAMA.: 
BOP Predicted Global Count Rate for MAMA: 
ETC PID IDs for Count Rates.............: 
Special Requirements or options.........: 
Comments: 
---------------------------------------------------------------------------
# Special needs of this proposal?

Scheduling: Execute when needed

Prerequisites: n/a

PDB update?               no
On-board table update?    no

# Special Requirements:
Real time?                N
Special commanding?       N
Quick Data turnaround?    N
Special timing required?  N
Other?                    N
Describe (& justify) special requirements:


-------------------------------------------------------------------------
# Link to Cycle 17 Science

Fraction of science programs supported by this calibration: 75% of COS

List categories of science which can't be executed until after this proposal:
  none
why: 

List categories of science which are best performed contemporaneous with 
this proposal: 
  none
why:

---------------------------------------------------------------------------

Expected FTE weeks for analysis:            1   
Required turnaround on analysis (weeks):    
Data volume (Mb needed for analysis):       
Special software needed for analysis? (Describe): 

Description of analysis Plans: