Distance
230.6
km · 143.3 mi
Bearing
221.7°
true · rev 41.7°
Terrain
BLOCKED
135.6 dB diffraction
Propagation
73/100
GOOD
Margin
-105.3
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 ≈ 522 m AGL at the midpoint (1565 m above the chord, 783 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 19.2 m) clears with margin. The geometric line of sight is obstructed — buried 541 m below terrain at its worst point.
Great circle
34.749, -94.804 → 33.189, -96.452 · 221.7°
Loss budget · 47 GHz
FSPL (free-space)
173.1
dB
Gaseous (O₂ + H₂O)
14.5
dB
Diffraction
135.6
dB
Rain attenuation
0.0
dB
Total path loss
323.3
dB
Gas rate 0.0629 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.6 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
-323.3
dB
RX antenna gain
30.0
dBi
RX power
-245.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-105.3
dB
Path weather · HRRR average of 9 samples
Temperature
80.4 °F
26.9 °C
Dewpoint
46.0 °F
7.8 °C
T/Td gap
34.4 °F
19.1 °C
Abs. humidity
7.6
g/m³
Pressure
964.7
mb
PWAT
15.1
mm
BL depth
2228.2
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
84
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%
34.6, -95.0
24.8 °C
10.8 °C
971.1 mb
1939.3
15.2 mm
—
25%
34.4, -95.2
25.9 °C
9.2 °C
979.9 mb
2233.7
15.3 mm
—
38%
34.2, -95.4
27.4 °C
8.3 °C
996.2 mb
2357.5
15.6 mm
—
Midpoint
34.0, -95.6
27.9 °C
8.0 °C
995.6 mb
2340.4
15.3 mm
—
63%
33.8, -95.8
28.2 °C
7.4 °C
995.6 mb
2386.7
16.4 mm
—
75%
33.6, -96.0
27.2 °C
7.0 °C
994.9 mb
2326.5
14.9 mm
—
88%
33.4, -96.2
28.4 °C
4.9 °C
991.2 mb
2492.0
16.1 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 79
at 22:00 UTC
· low 70
at 04:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 77 | GOOD |
| 21:00 | 78 | GOOD |
| 22:00 | 79 | GOOD |
| 23:00 | 78 | GOOD |
| 00:00 | 79 | GOOD |
| 01:00 | 79 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 71 | GOOD |
| 07:00 | 71 | GOOD |
| 08:00 | 78 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 78 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 · now | 78 | GOOD |