Distance
104.0
km · 64.6 mi
Bearing
174.1°
true · rev 354.1°
Terrain
BLOCKED
118.0 dB diffraction
Propagation
72/100
GOOD
Margin
-72.6
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 ≈ 106 m AGL at the midpoint (318 m above the chord, 159 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 12.9 m) clears with margin. The geometric line of sight is obstructed — buried 196 m below terrain at its worst point.
Great circle
34.05, -96.73 → 33.12, -96.615 · 174.1°
Loss budget · 47 GHz
FSPL (free-space)
166.2
dB
Gaseous (O₂ + H₂O)
6.4
dB
Diffraction
118.0
dB
Rain attenuation
0.0
dB
Total path loss
290.6
dB
Gas rate 0.0613 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.1 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
-290.6
dB
RX antenna gain
30.0
dBi
RX power
-212.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-72.6
dB
Path weather · HRRR average of 9 samples
Temperature
81.5 °F
27.5 °C
Dewpoint
44.1 °F
6.7 °C
T/Td gap
37.5 °F
20.8 °C
Abs. humidity
7.1
g/m³
Pressure
986.9
mb
PWAT
15.7
mm
BL depth
2303.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
72/100
Rain
100
14%
Humidity
88
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
82
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
34.1, -96.7
27.2 °C
7.4 °C
987.0 mb
2318.3
15.1 mm
—
13%
33.9, -96.7
27.5 °C
8.4 °C
988.9 mb
2286.1
17.6 mm
—
25%
33.8, -96.7
27.5 °C
8.4 °C
988.9 mb
2286.1
17.6 mm
—
38%
33.7, -96.7
26.8 °C
8.0 °C
986.9 mb
2271.6
16.0 mm
—
Midpoint
33.6, -96.7
27.4 °C
6.2 °C
990.0 mb
2225.0
14.7 mm
—
63%
33.5, -96.7
27.3 °C
6.0 °C
987.4 mb
2252.5
15.0 mm
—
75%
33.4, -96.6
27.9 °C
4.9 °C
993.0 mb
2275.5
14.2 mm
—
88%
33.2, -96.6
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 mm
—
Destination
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Midpoint vertical profile
18-hour forecast · this path · 47 GHz
→ steady
Peak 81
at 00:00 UTC
· low 65
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 78 | GOOD |
| 21:00 | 80 | EXCELLENT |
| 22:00 | 80 | EXCELLENT |
| 23:00 | 80 | EXCELLENT |
| 00:00 | 81 | EXCELLENT |
| 01:00 | 77 | GOOD |
| 02:00 | 81 | EXCELLENT |
| 03:00 | 74 | GOOD |
| 04:00 | 73 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 79 | GOOD |
| 08:00 | 79 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 79 | GOOD |
| 12:00 | 76 | GOOD |
| 13:00 · now | 65 | GOOD |