Distance
155.0
km · 96.3 mi
Bearing
116.0°
true · rev 296.0°
Terrain
BLOCKED
112.7 dB diffraction
Propagation
68/100
GOOD
Margin
-52.0
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 ≈ 236 m AGL at the midpoint (707 m above the chord, 354 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 34.1 m) clears with margin. The geometric line of sight is obstructed — buried 406 m below terrain at its worst point.
Great circle
33.74, -98.111 → 33.12, -96.615 · 116.0°
Loss budget · 10 GHz
FSPL (free-space)
156.2
dB
Gaseous (O₂ + H₂O)
1.1
dB
Diffraction
112.7
dB
Rain attenuation
0.0
dB
Total path loss
270.0
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.0 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
-270.0
dB
RX antenna gain
30.0
dBi
RX power
-192.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-52.0
dB
Path weather · HRRR average of 9 samples
Temperature
80.0 °F
26.7 °C
Dewpoint
43.6 °F
6.5 °C
T/Td gap
36.4 °F
20.2 °C
Abs. humidity
7.0
g/m³
Pressure
977.1
mb
PWAT
13.2
mm
BL depth
2253.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
68/100
Rain
100
14%
Humidity
70
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
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
33.7, -98.1
27.3 °C
4.7 °C
982.9 mb
2360.9
12.1 mm
—
13%
33.7, -97.9
26.5 °C
5.0 °C
979.1 mb
2279.7
11.9 mm
—
25%
33.6, -97.7
25.6 °C
7.0 °C
977.1 mb
2298.9
13.2 mm
—
38%
33.5, -97.6
25.4 °C
8.0 °C
982.7 mb
2057.4
12.1 mm
—
Midpoint
33.4, -97.4
24.6 °C
9.7 °C
983.7 mb
2030.7
14.6 mm
—
63%
33.4, -97.2
27.3 °C
8.1 °C
993.0 mb
2239.7
13.9 mm
—
75%
33.3, -97.0
27.1 °C
7.1 °C
994.6 mb
2296.0
13.4 mm
—
88%
33.2, -96.8
28.1 °C
4.7 °C
992.1 mb
2338.5
14.1 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 · 10 GHz
→ steady
Peak 82
at 05:00 UTC
· low 72
at 11:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 77 | GOOD |
| 00:00 | 79 | GOOD |
| 01:00 | 81 | EXCELLENT |
| 02:00 | 78 | GOOD |
| 03:00 | 80 | EXCELLENT |
| 04:00 | 80 | EXCELLENT |
| 05:00 | 82 | EXCELLENT |
| 06:00 | 81 | EXCELLENT |
| 07:00 | 81 | EXCELLENT |
| 08:00 | 80 | EXCELLENT |
| 09:00 | 81 | EXCELLENT |
| 10:00 | 82 | EXCELLENT |
| 11:00 | 72 | GOOD |
| 12:00 · now | 75 | GOOD |