first commit

2026-06-23 09:13:51 +03:00
commit f6c7db328f
103 changed files with 1618 additions and 0 deletions
@@ -0,0 +1,63 @@
+from pyproj import Geod
+
+from app.core.antenna import AntennaPattern, gain
+from app.models.antenna import (
+    AntennaPatternSpec,
+    BeamRequest,
+    BeamResponse,
+    PatternResponse,
+    PatternSample,
+)
+
+_GEOD = Geod(ellps="WGS84")
+
+
+def _to_core(spec: AntennaPatternSpec) -> AntennaPattern:
+    return AntennaPattern(
+        pattern=spec.pattern,
+        azimuth_deg=spec.azimuth_deg,
+        tilt_deg=spec.tilt_deg,
+        gain_dbi=spec.gain_dbi,
+        beamwidth_h=spec.beamwidth_h,
+        beamwidth_v=spec.beamwidth_v,
+        front_to_back_db=spec.front_to_back_db,
+        sidelobe_floor_db=spec.sidelobe_floor_db,
+    )
+
+
+def normalize_pattern(spec: AntennaPatternSpec) -> PatternResponse:
+    pattern = _to_core(spec)
+    samples = [
+        PatternSample(azimuth_deg=az, elevation_deg=0, gain_dbi=gain(pattern, az, 0))
+        for az in range(0, 360, 5)
+    ]
+    return PatternResponse(pattern=spec.pattern, samples=samples)
+
+
+def beam_geometry(request: BeamRequest) -> BeamResponse:
+    antenna = request.antenna
+    half_width = (antenna.beamwidth_h or 360.0) / 2.0
+    if antenna.pattern == "omni":
+        azimuths = list(range(0, 361, 10))
+    else:
+        start = antenna.azimuth_deg - half_width
+        end = antenna.azimuth_deg + half_width
+        azimuths = [start + (end - start) * i / 32 for i in range(33)]
+
+    coords = [[request.origin.lon, request.origin.lat]]
+    for azimuth in azimuths:
+        lon, lat, _ = _GEOD.fwd(request.origin.lon, request.origin.lat, azimuth, request.radius_m)
+        coords.append([lon, lat])
+    coords.append([request.origin.lon, request.origin.lat])
+
+    return BeamResponse(
+        geojson={
+            "type": "Feature",
+            "properties": {
+                "pattern": antenna.pattern,
+                "azimuth_deg": antenna.azimuth_deg,
+                "radius_m": request.radius_m,
+            },
+            "geometry": {"type": "Polygon", "coordinates": [coords]},
+        }
+    )