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feat: add horizontal paramaters to FITSObservation struct in @observerly/iris #231

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Oct 22, 2024
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feat: add horizontal paramaters to FITSObservation struct in @observerly/iris #231

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45 changes: 45 additions & 0 deletions pkg/fits/fits.go
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,10 @@ type FITSObservation struct {
Equinox float32 `json:"equinox"` // Equinox of observation e.g., J2000
RA float32 `json:"ra"` // Right Ascension of observation
Dec float32 `json:"dec"` // Declination of observation
Altitude float32 `json:"altitude"` // Altitude of the observation
Azimuth float32 `json:"azimuth"` // Azimuth of the observation
Airmass float32 `json:"airmass"` // Airmass of the observation
Refraction float32 `json:"refraction"` // Refraction of the observation
Object string `json:"object"` // The name for the object observed
Telescope string `json:"telescope"` // The telescope used to acquire the data
Instrument string `json:"instrument"` // The instrument used to acquire the data
Expand Down Expand Up @@ -191,6 +195,15 @@ func (f *FITSImage) AddObservationEntry(observation *FITSObservation) *FITSImage
Comment: "Equinox of observation e.g., Julian 2000.0",
}

// Necessary for Twirl API Plate Solving
f.Header.Strings["RADESYS"] = struct {
Value string
Comment string
}{
Value: "ICRS",
Comment: "International Celestial Reference System",
}

// Necessary for Twirl API Plate Solving
f.Header.Floats["RA"] = struct {
Value float32
Expand All @@ -200,6 +213,22 @@ func (f *FITSImage) AddObservationEntry(observation *FITSObservation) *FITSImage
Comment: "Right Ascension (in degrees) of the observation",
}

f.Header.Floats["ALT"] = struct {
Value float32
Comment string
}{
Value: observation.Altitude,
Comment: "Altitude (in degrees) of the observation",
}

f.Header.Floats["AZ"] = struct {
Value float32
Comment string
}{
Value: observation.Azimuth,
Comment: "Azimuth (in degrees) of the observation",
}

// Necessary for Twirl API Plate Solving
f.Header.Floats["DEC"] = struct {
Value float32
Expand All @@ -209,6 +238,22 @@ func (f *FITSImage) AddObservationEntry(observation *FITSObservation) *FITSImage
Comment: "Declination (in degrees) of the observation",
}

f.Header.Floats["AIRMASS"] = struct {
Value float32
Comment string
}{
Value: observation.Airmass,
Comment: "Airmass of the observation (sec z)",
}

f.Header.Floats["REFRACT"] = struct {
Value float32
Comment string
}{
Value: observation.Refraction,
Comment: "Refraction correction (in degrees) of the observation",
}

f.Header.Strings["OBJECT"] = struct {
Value string
Comment string
Expand Down
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