Obtaining the Space Indices

julia> using Dates
julia> using SpaceIndices
julia> SpaceIndices.Scratch.clear_scratchspaces!(SpaceIndices)

After the initialization shown in Initialization of Space Indices, the user can obtain the space index value using the function:

space_index(::Val{:index}, jd::Number; kwargs...) -> Number
space_index(::Val{:index}, instant::DateTime; kwargs...) -> Number

where index is the desired space index and jd is the Julian Day to obtain the information. The latter can also be specified using instant, which is a DateTime object.

julia> SpaceIndices.init()[ Info: Downloading the file 'DTCFILE.TXT' from 'https://sol.spacenvironment.net/JB2008/indices/DTCFILE.TXT'...
[ Info: Downloading the file 'SOLFSMY.TXT' from 'https://sol.spacenvironment.net/JB2008/indices/SOLFSMY.TXT'...
[ Info: Downloading the file 'SW-All.csv' from 'https://celestrak.org/SpaceData/SW-All.csv'...
[ Info: Downloading the file 'Hp30_ap30_complete_series.txt' from 'https://kp.gfz.de/app/files/Hp30_ap30_complete_series.txt'...
[ Info: Downloading the file 'Hp60_ap60_complete_series.txt' from 'https://kp.gfz.de/app/files/Hp60_ap60_complete_series.txt'...
[ Info: Downloading the file 'hpo_forecast_mean_bars_Hp30.json' from 'https://isdc-data.gfz.de/geomagnetism/HpoForecast/v0102/output/Hpo/json/hpo_forecast_mean_bars_Hp30.json'...
[ Info: Downloading the file 'hpo_forecast_mean_bars_Hp60.json' from 'https://isdc-data.gfz.de/geomagnetism/HpoForecast/v0102/output/Hpo/json/hpo_forecast_mean_bars_Hp60.json'...
julia> space_index(Val(:F10adj), DateTime(2020, 6, 19))70.2
julia> space_index(Val(:F10adj), 2.4590195e6)70.2

The following space indices are currently supported:

Space Index Set	Index	Description	Unit
`Celestrak`	`F10obs`	Observed F10.7 (10.7-cm solar flux)	10⁻²² W / (M² ⋅ Hz)
	`F10obs_avg_center81`	Observed F10.7 (10.7-cm solar flux) averaged over 81 days centered	10⁻²² W / (M² ⋅ Hz)
	`F10obs_avg_last81`	Observed F10.7 (10.7-cm solar flux) averaged over 81 last days	10⁻²² W / (M² ⋅ Hz)
	`F10adj`	Adjusted F10.7 (10.7-cm solar flux)	10⁻²² W / (M² ⋅ Hz)
	`F10adj_avg_center81`	Observed F10.7 (10.7-cm solar flux) averaged over 81 days centered	10⁻²² W / (M² ⋅ Hz)
	`F10adj_avg_last81`	Observed F10.7 (10.7-cm solar flux) averaged over 81 last days	10⁻²² W / (M² ⋅ Hz)
	`Ap`	Ap index computed every three hours
	`Ap_daily`	Daily Ap index
	`Kp`	Kp index computed every three hours
	`Kp_daily`	Daily Kp index
	`Cp`	Daily planetary character figure
	`C9`	Daily magnetic index on Cp basis
	`ISN`	International sunspot number
	`BSRN`	Bartels solar rotation number
	`ND`	Number of days into Bartels solar rotation cycle	Days
`JB2008`	`DTC`	Exospheric temperature variation caused by the Dst index	K
	`S10`	EUV index (26-34 nm) scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
	`M10`	MG2 index scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
	`Y10`	Solar X-ray & Lya index scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
	`S81a`	81-day averaged EUV index (26-34 nm) scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
	`M81a`	81-day averaged MG2 index scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
	`Y81a`	81-day averaged solar X-ray & Lya index scaled to F10.7	10⁻²² W / (M² ⋅ Hz)
`Hpo`	`Hp30`	Geomagnetic index with 30-minute resolution
	`ap30`	Linear geomagnetic activity index (30-minute)
	`Hp60`	Geomagnetic index with 60-minute resolution
	`ap60`	Linear geomagnetic activity index (60-minute)