Distance
112.3
km · 69.8 mi
Bearing
108.0°
true · rev 288.0°
Terrain
BLOCKED
97.0 dB diffraction
Propagation
69/100
GOOD
Margin
-33.3
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 ≈ 124 m AGL at the midpoint (371 m above the chord, 186 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 29.0 m) clears with margin. The geometric line of sight is obstructed — buried 187 m below terrain at its worst point.
Great circle
33.437, -97.763 → 33.12, -96.615 · 108.0°
Loss budget · 10 GHz
FSPL (free-space)
153.5
dB
Gaseous (O₂ + H₂O)
0.8
dB
Diffraction
97.0
dB
Rain attenuation
0.0
dB
Total path loss
251.3
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.5 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
-251.3
dB
RX antenna gain
30.0
dBi
RX power
-173.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-33.3
dB
Path weather · HRRR average of 9 samples
Temperature
79.5 °F
26.4 °C
Dewpoint
45.6 °F
7.6 °C
T/Td gap
33.8 °F
18.8 °C
Abs. humidity
7.5
g/m³
Pressure
978.5
mb
PWAT
15.3
mm
BL depth
2263.6
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
69/100
Rain
100
14%
Humidity
82
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
33.4, -97.8
26.9 °C
6.0 °C
985.3 mb
2296.8
13.3 mm
—
13%
33.4, -97.6
24.7 °C
8.2 °C
978.5 mb
2210.2
14.3 mm
—
25%
33.4, -97.5
24.9 °C
9.4 °C
985.5 mb
2208.6
14.2 mm
—
38%
33.3, -97.3
24.7 °C
9.8 °C
983.6 mb
2071.5
15.0 mm
—
Midpoint
33.3, -97.2
26.1 °C
9.3 °C
991.9 mb
2156.4
16.6 mm
—
63%
33.2, -97.0
27.0 °C
6.4 °C
994.5 mb
2280.0
15.1 mm
—
75%
33.2, -96.9
27.7 °C
6.0 °C
995.5 mb
2360.1
15.5 mm
—
88%
33.2, -96.8
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 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 · 10 GHz
→ steady
Peak 83
at 10:00 UTC
· low 72
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 74 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 74 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 | 77 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 82 | EXCELLENT |
| 04:00 | 81 | EXCELLENT |
| 05:00 | 80 | EXCELLENT |
| 06:00 | 81 | EXCELLENT |
| 07:00 | 81 | EXCELLENT |
| 08:00 | 80 | EXCELLENT |
| 09:00 | 81 | EXCELLENT |
| 10:00 | 83 | EXCELLENT |
| 11:00 | 73 | GOOD |
| 12:00 | 73 | GOOD |
| 13:00 · now | 75 | GOOD |