feat(satellites): owner, operator and COSPAR groundwork for the orbital view

The orbital view reads a satellite's owner country, operator, COSPAR id,
TLE epoch and whether its class can be ridden. #1558 now carries only
what the class toggles read, so this brings the rest back here, where it
is first used: the classes.js helpers and the UCS pack's operator and
owner fields.

scripts/build-ucs-satellites.py

@@ -2,9 +2,9 @@
 '''Maintainer-only UCS Satellite Database pack build (openpyxl).
 
 Reads the UCS Excel release and writes the compact pack the satellites layer
-loads: one row per satellite, keyed by NORAD number, with a string-table index
-for its purpose, the one column the layer's classes read. Starlink rows are
-left out: the layer files every STARLINK object under its own class by name.
+loads: one row per satellite, keyed by NORAD number, with string-table indexes
+for the repeated text columns. Starlink rows are left out: the layer files
+every STARLINK object under its own class and operator without them.
 
 Usage: python scripts/build-ucs-satellites.py "<path>/UCS-Satellite-Database 5-1-2023.xlsx"
 '''
@@ -26,7 +26,12 @@ URL = 'https://www.ucsusa.org/satellite_database'
 
 # Output column -> spreadsheet header.
 COLUMNS = {
+    'operator': 'Operator/Owner',
+    'operatorCountry': 'Country of Operator/Owner',
     'purpose': 'Purpose',
+    'detailedPurpose': 'Detailed Purpose',
+    'users': 'Users',
+    'orbitClass': 'Class of Orbit',
 }
 STARLINK = re.compile(r'\bstarlink\b', re.I)
 
@@ -60,12 +65,11 @@ def build(xlsx: Path) -> dict:
         except (TypeError, ValueError):
             invalid_norad += 1
             continue
-        if norad <= 0:
-            invalid_norad += 1
-            continue
         record = [norad]
         for key, column in COLUMNS.items():
             text = clean(row[header[column]])
+            if key == 'orbitClass':
+                text = text.upper()
             if text not in index[key]:
                 index[key][text] = len(tables[key])
                 tables[key].append(text)