Distance
177.6
km · 110.4 mi
Bearing
124.0°
true · rev 304.0°
Terrain
BLOCKED
117.6 dB diffraction
Propagation
67/100
GOOD
Margin
-58.2
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 ≈ 310 m AGL at the midpoint (929 m above the chord, 464 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 36.5 m) clears with margin. The geometric line of sight is obstructed — buried 543 m below terrain at its worst point.
Great circle
34.092, -98.035 → 33.189, -96.452 · 124.0°
Loss budget · 10 GHz
FSPL (free-space)
157.4
dB
Gaseous (O₂ + H₂O)
1.2
dB
Diffraction
117.6
dB
Rain attenuation
0.0
dB
Total path loss
276.2
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 6.8 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
-276.2
dB
RX antenna gain
30.0
dBi
RX power
-198.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-58.2
dB
Path weather · HRRR average of 9 samples
Temperature
81.3 °F
27.4 °C
Dewpoint
42.8 °F
6.0 °C
T/Td gap
38.5 °F
21.4 °C
Abs. humidity
6.8
g/m³
Pressure
982.4
mb
PWAT
13.4
mm
BL depth
2284.9
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
67/100
Rain
100
14%
Humidity
70
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
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, -98.0
28.1 °C
4.3 °C
983.9 mb
2357.3
11.9 mm
—
13%
34.0, -97.8
27.2 °C
6.1 °C
983.6 mb
2278.9
12.2 mm
—
25%
33.9, -97.6
27.5 °C
6.5 °C
984.0 mb
2379.7
14.4 mm
—
38%
33.8, -97.4
26.5 °C
8.4 °C
982.4 mb
2170.7
15.4 mm
—
Midpoint
33.6, -97.2
26.7 °C
6.9 °C
987.3 mb
2092.0
12.2 mm
—
63%
33.5, -97.0
27.3 °C
7.2 °C
991.7 mb
2234.2
13.6 mm
—
75%
33.4, -96.8
27.6 °C
5.2 °C
993.6 mb
2274.0
12.7 mm
—
88%
33.3, -96.6
27.8 °C
5.4 °C
994.2 mb
2397.3
14.6 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 · 10 GHz
→ steady
Peak 82
at 05:00 UTC
· low 75
at 20:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 75 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 75 | GOOD |
| 01:00 | 77 | GOOD |
| 02:00 | 77 | GOOD |
| 03:00 | 80 | EXCELLENT |
| 04:00 | 79 | GOOD |
| 05:00 | 82 | EXCELLENT |
| 06:00 | 82 | EXCELLENT |
| 07:00 | 80 | EXCELLENT |
| 08:00 | 81 | EXCELLENT |
| 09:00 | 80 | EXCELLENT |
| 10:00 | 82 | EXCELLENT |
| 11:00 | 82 | EXCELLENT |
| 12:00 · now | 75 | GOOD |