20211021

Taking a few dark sky science+sky HPF exposures

The HPF team requested us take a few of these to help calculate throughput differences between the sky and science fibers

1. When you are running OCD to observe HETDEX fields,

2. When logged in to hpf@hpf

3. Right after the TO finishes the setup_complete on an OCD target, run:

      [hpf@hpf ~]   hpfseconds_parallel sky 900 1
   

4. After the NR entry appears, edit the target to:
   1. Add the program ID ENG21-3-003
   2. Be sure "Start" and "Exp Start" are both the same as when you ran the script
   3. Change data type to cal

We can take 2 or 3 of these dark sky exposures per night with HETDEX, hoping to cover a few more nights with different sky conditions.