Distance
156.3
km · 97.1 mi
Bearing
144.2°
true · rev 324.2°
Terrain
BLOCKED
129.9 dB diffraction
Propagation
73/100
GOOD
Margin
-91.1
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 ≈ 240 m AGL at the midpoint (719 m above the chord, 359 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 15.8 m) clears with margin. The geometric line of sight is obstructed — buried 372 m below terrain at its worst point.
Great circle
34.333, -97.434 → 33.189, -96.452 · 144.2°
Loss budget · 47 GHz
FSPL (free-space)
169.8
dB
Gaseous (O₂ + H₂O)
9.5
dB
Diffraction
129.9
dB
Rain attenuation
0.0
dB
Total path loss
309.1
dB
Gas rate 0.0606 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
-309.1
dB
RX antenna gain
30.0
dBi
RX power
-231.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-91.1
dB
Path weather · HRRR average of 9 samples
Temperature
81.3 °F
27.4 °C
Dewpoint
43.2 °F
6.2 °C
T/Td gap
38.0 °F
21.1 °C
Abs. humidity
6.9
g/m³
Pressure
980.0
mb
PWAT
13.9
mm
BL depth
2293.4
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
89
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
34.3, -97.4
27.8 °C
7.0 °C
980.0 mb
2451.4
15.8 mm
—
13%
34.2, -97.3
26.9 °C
6.7 °C
984.1 mb
2278.3
12.6 mm
—
25%
34.0, -97.2
26.7 °C
8.4 °C
982.9 mb
2300.6
15.1 mm
—
38%
33.9, -97.1
27.8 °C
7.6 °C
987.0 mb
2340.2
15.4 mm
—
Midpoint
33.8, -96.9
26.9 °C
6.0 °C
986.5 mb
2177.0
13.2 mm
—
63%
33.6, -96.8
27.4 °C
6.2 °C
988.7 mb
2225.4
13.4 mm
—
75%
33.5, -96.7
27.1 °C
5.9 °C
990.2 mb
2210.9
12.9 mm
—
88%
33.3, -96.6
27.9 °C
4.2 °C
993.0 mb
2277.3
13.1 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 67
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 80 | EXCELLENT |
| 21:00 | 79 | GOOD |
| 22:00 | 79 | GOOD |
| 23:00 | 79 | GOOD |
| 00:00 | 77 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 73 | GOOD |
| 04:00 | 79 | GOOD |
| 05:00 | 78 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 79 | GOOD |
| 08:00 | 76 | GOOD |
| 09:00 | 76 | GOOD |
| 10:00 | 77 | GOOD |
| 11:00 | 77 | GOOD |
| 12:00 · now | 67 | GOOD |