Distance
137.5
km · 85.4 mi
Bearing
222.2°
true · rev 42.2°
Terrain
BLOCKED
125.1 dB diffraction
Propagation
71/100
GOOD
Margin
-84.1
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 ≈ 185 m AGL at the midpoint (556 m above the chord, 278 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 14.8 m) clears with margin. The geometric line of sight is obstructed — buried 283 m below terrain at its worst point.
Great circle
34.041, -95.625 → 33.12, -96.615 · 222.2°
Loss budget · 47 GHz
FSPL (free-space)
168.6
dB
Gaseous (O₂ + H₂O)
8.3
dB
Diffraction
125.1
dB
Rain attenuation
0.0
dB
Total path loss
302.1
dB
Gas rate 0.0607 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.9 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
-302.1
dB
RX antenna gain
30.0
dBi
RX power
-224.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-84.1
dB
Path weather · HRRR average of 9 samples
Temperature
82.5 °F
28.1 °C
Dewpoint
43.5 °F
6.4 °C
T/Td gap
39.0 °F
21.7 °C
Abs. humidity
6.9
g/m³
Pressure
992.2
mb
PWAT
15.5
mm
BL depth
2397.4
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
71/100
Rain
100
14%
Humidity
89
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
70
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
34.0, -95.6
27.9 °C
8.0 °C
995.6 mb
2340.4
15.3 mm
—
13%
33.9, -95.7
28.8 °C
7.4 °C
999.5 mb
2421.4
16.7 mm
—
25%
33.8, -95.9
28.2 °C
7.4 °C
995.6 mb
2386.7
16.4 mm
—
38%
33.7, -96.0
27.8 °C
8.4 °C
996.4 mb
2419.8
16.9 mm
—
Midpoint
33.6, -96.1
27.8 °C
7.5 °C
996.2 mb
2415.8
16.6 mm
—
63%
33.5, -96.2
27.7 °C
6.3 °C
992.2 mb
2399.8
15.3 mm
—
75%
33.4, -96.4
28.4 °C
4.4 °C
992.2 mb
2434.7
15.3 mm
—
88%
33.2, -96.5
27.8 °C
4.1 °C
995.4 mb
2379.9
13.3 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 22:00 UTC
· low 70
at 03:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 76 | GOOD |
| 21:00 | 78 | GOOD |
| 22:00 | 80 | EXCELLENT |
| 23:00 | 76 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 70 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 78 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 79 | GOOD |
| 08:00 | 76 | GOOD |
| 09:00 | 77 | GOOD |
| 10:00 | 78 | GOOD |
| 11:00 | 77 | GOOD |
| 12:00 · now | 77 | GOOD |