Distance
32.2
km · 20.0 mi
Bearing
117.7°
true · rev 297.7°
Terrain
BLOCKED
54.5 dB diffraction
Propagation
49/100
POOR
Margin
+4.7
dB over CW threshold
Terrain profile · SRTM 30 m + canopy + MS footprints
Line of sight
1st Fresnel
Duct layer
Horizon ray
Common volume
Over the horizon: the two horizon-skimming rays intersect at the common volume ≈ 10 m AGL at the midpoint (31 m above the chord, 15 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 7.2 m) clears with margin. The geometric line of sight is obstructed — buried 12 m below terrain at its worst point.
Great circle
33.324, -96.758 → 33.189, -96.452 · 117.7°
Loss budget · 47 GHz
FSPL (free-space)
156.0
dB
Gaseous (O₂ + H₂O)
2.8
dB
Diffraction
54.5
dB
Rain attenuation
0.0
dB
Total path loss
213.3
dB
Gas rate 0.0860 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 15.3 g/m³
Power budget
TX power
20.0
dBm
(100.0 mW)
TX antenna gain
30.0
dBi
Feed loss (×2)
-2.0
dB
EIRP
48.0
dBm
Path loss
-213.3
dB
RX antenna gain
30.0
dBi
RX power
-135.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
4.7
dB
Path weather · HRRR average of 9 samples
Temperature
68.3 °F
20.2 °C
Dewpoint
64.5 °F
18.1 °C
T/Td gap
3.8 °F
2.1 °C
Abs. humidity
15.3
g/m³
Pressure
991.7
mb
PWAT
42.2
mm
BL depth
705.1
m AGL
Refrac. gradient
-58.9
N/km
Propagation factors · 47 GHz
49/100
Rain
100
14%
Humidity
29
13%
PWAT
15
11%
Season
55
11%
T-Td Depression
18
10%
Refractivity
55
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.3, -96.8
21.1 °C
18.1 °C
991.7 mb
-51.7
758.9
42.3 mm
—
13%
33.3, -96.7
20.2 °C
18.1 °C
993.1 mb
-56.4
659.9
44.6 mm
—
25%
33.3, -96.7
20.0 °C
18.2 °C
995.4 mb
-53.2
781.6
42.2 mm
—
38%
33.3, -96.6
20.0 °C
18.2 °C
995.4 mb
-53.2
781.6
42.2 mm
—
Midpoint
33.3, -96.6
20.0 °C
18.2 °C
995.4 mb
-53.2
781.6
42.2 mm
—
63%
33.2, -96.6
20.0 °C
18.2 °C
995.4 mb
-53.2
781.6
42.2 mm
—
75%
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
88%
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
Destination
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 63
at 13:00 UTC
· low 34
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 44 | POOR |
| 22:00 | 34 | POOR |
| 23:00 | 46 | POOR |
| 00:00 | 47 | POOR |
| 01:00 | 49 | POOR |
| 02:00 | 39 | POOR |
| 03:00 | 43 | POOR |
| 04:00 | 54 | MARGINAL |
| 05:00 | 54 | MARGINAL |
| 06:00 | 56 | MARGINAL |
| 07:00 | 57 | MARGINAL |
| 08:00 | 56 | MARGINAL |
| 09:00 | 56 | MARGINAL |
| 10:00 | 60 | MARGINAL |
| 11:00 | 60 | MARGINAL |
| 12:00 | 61 | MARGINAL |
| 13:00 · now | 63 | MARGINAL |