Distance
226.3
km · 140.6 mi
Bearing
96.6°
true · rev 276.6°
Terrain
BLOCKED
144.1 dB diffraction
Propagation
73/100
GOOD
Margin
-112.7
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 ≈ 502 m AGL at the midpoint (1507 m above the chord, 754 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 19.0 m) clears with margin. The geometric line of sight is obstructed — buried 787 m below terrain at its worst point.
Great circle
33.445, -98.868 → 33.189, -96.452 · 96.6°
Loss budget · 47 GHz
FSPL (free-space)
173.0
dB
Gaseous (O₂ + H₂O)
13.6
dB
Diffraction
144.1
dB
Rain attenuation
0.0
dB
Total path loss
330.7
dB
Gas rate 0.0602 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.7 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
-330.7
dB
RX antenna gain
30.0
dBi
RX power
-252.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-112.7
dB
Path weather · HRRR average of 9 samples
Temperature
80.2 °F
26.8 °C
Dewpoint
42.7 °F
6.0 °C
T/Td gap
37.5 °F
20.8 °C
Abs. humidity
6.7
g/m³
Pressure
972.8
mb
PWAT
13.1
mm
BL depth
2277.9
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
90
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-03 20:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.4, -98.9
26.8 °C
5.7 °C
972.8 mb
2266.1
12.8 mm
—
13%
33.4, -98.6
27.3 °C
4.2 °C
972.8 mb
2244.0
12.3 mm
—
25%
33.4, -98.3
27.4 °C
5.3 °C
980.1 mb
2299.4
12.8 mm
—
38%
33.3, -98.0
26.9 °C
4.4 °C
979.1 mb
2255.8
11.1 mm
—
Midpoint
33.3, -97.7
24.8 °C
8.4 °C
978.6 mb
2203.7
13.9 mm
—
63%
33.3, -97.4
25.0 °C
9.7 °C
988.2 mb
2217.7
13.8 mm
—
75%
33.3, -97.1
27.1 °C
7.1 °C
994.6 mb
2296.0
13.4 mm
—
88%
33.2, -96.8
28.1 °C
4.7 °C
992.1 mb
2338.5
14.1 mm
—
Destination
33.2, -96.5
27.8 °C
4.1 °C
995.4 mb
2379.9
13.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 80
at 20:00 UTC
· low 64
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 80 | EXCELLENT |
| 21:00 | 80 | EXCELLENT |
| 22:00 | 80 | EXCELLENT |
| 23:00 | 80 | EXCELLENT |
| 00:00 | 78 | GOOD |
| 01:00 | 76 | GOOD |
| 02:00 | 76 | GOOD |
| 03:00 | 80 | EXCELLENT |
| 04:00 | 77 | GOOD |
| 05:00 | 77 | GOOD |
| 06:00 | 77 | GOOD |
| 07:00 | 75 | GOOD |
| 08:00 | 73 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 74 | GOOD |
| 11:00 | 66 | GOOD |
| 12:00 · now | 64 | MARGINAL |