Add old Swedish radar codes to OPERA radar database

[peterdesmet]

Swedish radars got upgraded in 2016-2019 and received new odim codes (see #79). Archived data still exists under the old odim codes, but these are not listed in the OPERA radar database (archive), except for sevar. I think they should all be added to the OPERA_RADAR_ARH_DB.json file. Here's an overview of all Swedish radars and their replacements: https://github.com/enram/data-repository/wiki/se

These old radars should be added:

• 1224: sease (data until 2017), replaced by sehem (start year 2017, data since 2017).
• 1228: sehud (data until 2016), replaced by sehuv (start year 2017, data since 2017)
• 1231: sekir (data until 2020), replaced by sekrn (start year 2020, data since 2021)
• 1225: sekkr (data until 2018), replaced by sekaa (start year 2018, data since 2019)
• 1229: selek (S) replaced by selek (D) in 2017
• 1274: seang (S) replaced by seang (D) in 2015
• 1227: selul (data until 2018), replaced by sella (start year 2018, data since 2019)
• 1230: seosu (data until 2016), replaced by seosd (start year 2016, data since 2016)
• 1226: seovi (data until 2017), replaced by seoer (start year 2017, data since 2017)
• 1289: sevar (data until 2016), replaced by sevax (start year 2016, data since 2016) already included in archive
• 1288: sevil (data until 2019), replaced by seatv (start year 2019, data since 2019)

Per radar:

• Retrieve metadata
• Verify metadata (by SMHI)
• Add replacedBy property?
• Add finishyear
• Add startyear for the old radars
• Verify that startyear for new radar is correct

[peterdesmet]

Example of suggested metadata. Items with <-- should be verified by SMHI / @CeciliaNilsson709

sease

{
    "number": "1224", <-- Number of sehem (sevar and sevax also share their number)
    "country": "Sweden",
    "countryid": "ESWI47",
    "oldcountryid": "SE47",
    "wmocode": "", <--
    "wigosid": "", <--
    "odimcode": "sease",
    "location": "Hemse (Ase)", <--
    "status": "0",
    "latitude": "57.3035", <-- 57.3035011292 according to vp file
    "longitude": "18.4001", <-- 18.400100708 according to vp file
    "heightofstation": "59", <--
    "band": "C", <--
    "doppler": "Y", <--
    "polarization": "D", <--
    "maxrange": "240", <--
    "startyear": "?", <--
    "finishyear": "2017", <--
    "heightantenna": "85", <--
    "diametrantenna": "4.2", < --
    "beam": "1", <-- 
    "gain": "44.3", <--
    "frequency": "5.605" <-- 
    "replacedby": "1224" <-- Either this or rely on number to detect replacements
}

[peterdesmet]

All old Swedish radars are now included, but some properties should be corrected:

• sekkr: add finishyear: 2018
• seovi: add finishyear: 2017
• seovi: correct location: Örnsköldsvik (not \\u00d6rnsk\\u00f6ldsvik)
• selul: add finishyear: 2018
• selul: correct location: Luleå (Rosvik) (not Lule\\u00e5 (Rosvik))
• sehud: add finishyear: 2016
• selek: add finishyear: 2017
• seosu: add finishyear: 2016
• seosu: correct location: Östersund (not \\u00d6stersund)
• sekir: add finishyear: 2020
• seang: add finishyear: 2015
• seang: correct location: Ängelholm (not \\u00c4ngelholm)
• sevil: add finishyear: 2019
• sevil: correct location: Åtvidaberg (Vilebo) (not \\u00c5tvidaberg (Vilebo))

I have manually corrected all the above for https://aloftdata.eu/radars/#sweden, but they should be corrected at the source.