HET Beginning-Trimester Report
  First Period of 2022
December 1 - March 30

This report is primarily to give updates to PIs on recent changes/improvements and to summarize the determination of time allocations for the 22-1 trimester.



Updates on recent changes/improvements:

Updates to documentation

   Further information has been added to the "Observing Status" page on Hydra, and continues to be updated with new details!
        https://hydra.as.utexas.edu/?a=help&h=7

   Acknowledgements for the HET and for each instrument are available here:
        https://hydra.as.utexas.edu/?a=help&h=61








Commissioning, Engineering, and Guaranteed Time allocations


The HET Board granted the following allocations for the 22-1 period:


In total the Board granted 311 hours of Comm/Eng/GTO time in 22-1; this is about the same as the 310 hours of Comm/Eng/GTO granted in 21-1.
 





Breakdown of how science hours for TACs at each partner were determined:



quantity
 Dec
(hrs)
 Jan
(hrs)
 Feb
(hrs)
 Mar
(hrs)
 Total
(hrs)
18deg-18deg times
 339.17
 334.00
 285.43
 289.23
 1247.83
Weather loss frac. 0.43
 0.43
 0.46
 0.47
Efficiency loss frac.
(align+PRs)
 0.05
 0.06
 0.06
 0.06
"Clear science" time
 183.66
 178.96
 144.89
 144.10
 651.60
Com/Eng/GTO time
 *calculated based on
  statistical averages of
  time actually used in
  previous ~3 years



263.00
"Allowed" hours
given to TACs
for science



388.60




 

Hours allowed for each TAC as determined Oct 15, 2021:


Partner
 Share
 Time deficit
correction
 Total hours
allowed
Allocated
as of Dec 1
(excl. Pr4)
Goettingen
 0.03860
 -0.26
 14.74
 14.80
Munich
 0.05724
 +2.76
 25.00
 25.00
PSU
 0.24897
 -7.52
 89.23
 86.14
UT
 0.65518
 +5.02
 259.62
 259.53

Corrections were applied using 20% of the cumulative deficits in time balance between the partners. As of August 1st 2021, those time deficits were:
  UT:   25.1h deficit
  PSU: 37.6h surplus
  M:    13.8h deficit
  G:     1.3h surplus
Actual time usage is carefully monitored to ensure equitable balance between the partners; these corrected allocations should help improve this balance over the long-term.

Note that TACs may allocate up to 8.3% at P0, 25% at P1, 33.3% at P2 and 33.3% at P3; P4 allocations are not restricted. Priorities of Com/Eng/GTO time are assigned by the HET Board.












SJ, 1 Dec 2021