[                                                 # This file is a list of json objects. Wrap the json in square brackets.  
  {                                               # The individual OB starts here.
    "calibration": {},                            # It is recommended that you not modify this section without speaking to the KPF Instrument Scientist.
    "schedule": {                                 # The Schedule section defines your observational strategy. This is an optional section for KPF, but it is required for KPF-CC. 
      "SchedulingMode": "Cadence",                # Leave as is. 
      "DesiredVisitsPerNight": 1,                 # The maximum number of visits to observe the target within one night. Not all nights are long enough to achieve the desired number of visits. See below.
      "MinVisitsPerNight": 1,                     # The minimum number of visits to observe the target within one night. This represents how many visits you will accept before it is no longer scientifically useful.
      "NightsPerSemester": 20,                    # The number of unique nights in the semester to observe the target.
      "interNightCadenceMin": 3,                  # The minimum number of days that must elapse after an observation before the next observation can be scheduled/observed.
      "intraNightCadenceMin": 0,                  # The minimum number of hours that must elapse after an visit before the next visit within the same night can be scheduled/observed.
      "MinimumElevation": "30",                   # The minimum elevation, in degrees, above the horizon for observing this star. Note the K1 pointing limits: https://www2.keck.hawaii.edu/inst/common/TelLimits.html
      "MinimumMoonSeparation": "30",              # The minimum moon separation, in degrees. Unless you have specific science requirements, we suggest 30 degrees as default.
      "weather_band_1": true,                     # Allow observation in weather band 1 (note: all KPF-CC OBs must be allowed in band1), when slowdown is <2x
      "weather_band_2": true,                     # Allow observation in weather band 1 (note: all KPF-CC OBs must be allowed in band1), when slowdown is between 2x - 4x
      "weather_band_3": false,                    # Allow observation in weather band 1 (note: all KPF-CC OBs must be allowed in band1), when slowdown is >4x
      "comment": "single star, no binary",        # Optional. A comment field for the observers. This is where you should specify acquisition instructions, like which binary component to observe for example.
      "custom_time_constraints": [                # Optional. PIs may constrain their observations to take place within a specific time window for any scientific reason. Submit windows like this. Ensure timestamp formatting is correct.
        {
          "end_datetime": "2025-06-19T12:30",
          "start_datetime": "2025-05-19T12:30"
        },
        {
          "end_datetime": "2025-02-08T18:00",
          "start_datetime": "2025-02-04T06:15"
        }
      ]
    },
    "target": {                                   # The Target section describes stellar parameters
      "TargetName": "HD 191939",                  # A human readable star name
      "GaiaID": "DR3_2248126315275354496",        # The Gaia ID, preferably DR3. Optional but highly encouraged
      "twoMASSID": "J20080574+6651019",           # optional
      "tic_id": "269701147",                      # optional
      "Parallax": 18.6967,                        # optional (units of millearcseconds)
      "RadialVelocity": -9.266,                   # optional, but assists in the RV calculation (units of km/s)
      "Gmag": 8.782845,                           # G magnitude, assists observers in finding the star
      "Jmag": 7.597,                              # J magnitude, sets the guide camera filter
      "Teff": 5590,                               # Stellar temperature, helps the KPF DRP set the binary mask for CCF calculation
      "RA": "20:08:05.7551464176",                # Right Ascension 
      "DEC": "+66:51:02.076637068",               # Declination
      "Equinox": "J2000",                         # Equinox for coordinate zero point
      "PMRA": 150.194,                            # Proper motion in RA (millearcseconds per year)
      "PMDEC": -63.988,                           # Proper motion in Declination (millearcseconds per year)
      "Epoch": 2000                               # Epoch for proper motion zero point
    },
    "observation": {                              # The Observation section sets the instrument configuration during the exposure. Talk to the KPF Instrument Scientist for more information.
      "Object": "HD 191939",                      # Does not have to match the TargetName above, but this is the name that will be written to in the KOA
      "nExp": 1,                                  # Number of exposures to take during a single visit
      "ExpTime": 1,                               # Desired exoposure time in seconds
      "TriggerCaHK": true,                        # Use the CaHK spectrograph 
      "TriggerGreen": true,                       # Use the Green spectrograph 
      "TriggerRed": true,                         # Use the Red spectrograph 
      "ExpMeterMode": "monitor",                  # Options: "monitor", 
      "AutoExpMeter": true,                       
      "ExpMeterExpTime": 1,                       # Do not change.
      "ExpMeterThreshold": 50000,                 # Cutoff SNR. Units of Megaphotons/Angstrom. Required if you want to participate in band2 or band3. See this page: https://www2.keck.hawaii.edu/inst/kpf/expmetertermination/
      "TakeSimulCal": true,
      "AutoNDFilters": true,
      "CalND1": "OD 0.1",
      "CalND2": "OD 0.1",
      "GuideHere": true
    },
    "metadata": {                                 # The metadata section contains information about your program.
      "ObserverID": 1234,                         # Your unique Keck Observer ID can be found on your Observer page.
      "ObserverName": "Star E. Sky",              # Your name here
      "Semid": "2001B_U043",                      # The semester and program ID together
      "Semester": "2001B",                        # Just the semester
      "Progid": "U043",                           # Just the program ID
      "Tags": [],                                 # Ignore
      "ob_feasible": true,                        # Ignore
      "Submitter": "Star E. Sky",                 # Do not touch
      "submitted": true,                          # Do not touch
      "details": "Passed all infeasibility checks", # Do not touch
      "status": "SUCCESS",                        # Do not touch
      "state": "OBSERVING_BLOCK_SUBMITTED"        # Do not touch
    }
  }     # if you want to submit more OBs simultaneously, add a comma here and copy the above. Repeat as needed.
]       # end with the closing square bracket.