Distance
246.5
km · 153.1 mi
Bearing
223.2°
true · rev 43.2°
Terrain
BLOCKED
138.6 dB diffraction
Propagation
73/100
GOOD
Margin
-109.6
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 ≈ 596 m AGL at the midpoint (1788 m above the chord, 894 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 19.8 m) clears with margin. The geometric line of sight is obstructed — buried 640 m below terrain at its worst point.
Great circle
34.749, -94.804 → 33.12, -96.615 · 223.2°
Loss budget · 47 GHz
FSPL (free-space)
173.7
dB
Gaseous (O₂ + H₂O)
15.4
dB
Diffraction
138.6
dB
Rain attenuation
0.0
dB
Total path loss
327.6
dB
Gas rate 0.0624 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.4 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
-327.6
dB
RX antenna gain
30.0
dBi
RX power
-249.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-109.6
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.1 °C
Dewpoint
45.4 °F
7.4 °C
T/Td gap
35.5 °F
19.7 °C
Abs. humidity
7.4
g/m³
Pressure
964.7
mb
PWAT
15.2
mm
BL depth
2237.4
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
85
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
34.7, -94.8
24.2 °C
10.2 °C
964.7 mb
1597.9
13.8 mm
—
13%
34.5, -95.0
24.8 °C
10.8 °C
971.1 mb
1939.3
15.2 mm
—
25%
34.3, -95.3
25.9 °C
9.2 °C
979.9 mb
2233.7
15.3 mm
—
38%
34.1, -95.5
27.9 °C
8.0 °C
998.2 mb
2363.2
15.4 mm
—
Midpoint
33.9, -95.7
28.8 °C
7.4 °C
999.5 mb
2421.4
16.7 mm
—
63%
33.7, -95.9
28.2 °C
7.4 °C
995.6 mb
2386.7
16.4 mm
—
75%
33.5, -96.2
27.9 °C
5.6 °C
991.2 mb
2381.4
15.1 mm
—
88%
33.3, -96.4
28.4 °C
4.4 °C
992.2 mb
2434.7
15.3 mm
—
Destination
33.1, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 80
at 10:00 UTC
· low 70
at 04:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 77 | GOOD |
| 21:00 | 77 | GOOD |
| 22:00 | 77 | GOOD |
| 23:00 | 78 | GOOD |
| 00:00 | 77 | GOOD |
| 01:00 | 78 | GOOD |
| 02:00 | 71 | GOOD |
| 03:00 | 73 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 71 | GOOD |
| 07:00 | 79 | GOOD |
| 08:00 | 78 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 78 | GOOD |
| 12:00 · now | 78 | GOOD |