HET Beginning-Trimester Report
  First Period of 2020
December 1 - March 31

This report is primarily to summarize the determination of time allocations for the 20-1 trimester.


Commissioning, Engineering, and Guaranteed Time allocations

The HET Board granted the following allocations for the 20-1 period:

In total the Board granted 410 hours of Comm/Eng/GTO time in 20-1.


The Board also granted 17.5 hours of time to the LIGO HET followup project, but this time has not been subtracted from the time available, since the probability of triggering is low (but has very high potential for scientific significance).



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
 399.17
 334.00
 295.27
 289.23
 1257.67
Weather-insensitive
engineering time
 7.5
 7.5
 7.5
 7.5
 30.00
"Operational" time
 331.67
 326.50
 287.77
 281.73
 1227.69
Weather loss frac. 0.346
 0.341
 0.319
 0.331
Efficiency loss frac.
(align+PRs)
 0.094
 0.094
 0.097
 0.094
"Clear science" time
 196.52
 194.94
 176.96
 170.76
 739.18
Com/Eng/GTO time



380.00
"Allowed" hours
given to TACs
for science



359.18

(note that HETDEX's allocation of 250h was amended to 220h in January 2020, and HETDEX returned 30h to be allocated to the TACs as of January 15, 2020)

Original hours allowed for each TAC as of November 1, 2019:

Partner
 Share
 Notes
 Total hours
allowed
Goettingen
 0.0085
3.1
Munich
 0.0590
21.3
PSU
 0.2568
 time trade: 92.24 - 4.75
 87.6
UT
 0.6757
 time trade: 242.70 + 4.75
 247.5

Amended hours allowed for each TAC after HETDEX returned 30h, as of January 15 2020:

Partner
 Total hours
allowed
Goettingen
 3.4
Munich
 22.9
PSU
 95.3
UT
 268.9



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. GTO and engineering time are assigned by the HET board and not from this formula.






SJ, Feb 24 2020