Distance
164.4
km · 102.2 mi
Bearing
93.0°
true · rev 273.0°
Terrain
BLOCKED
108.5 dB diffraction
Propagation
69/100
GOOD
Margin
-48.4
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 ≈ 265 m AGL at the midpoint (796 m above the chord, 398 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 35.1 m) clears with margin. The geometric line of sight is obstructed — buried 365 m below terrain at its worst point.
Great circle
33.209, -98.379 → 33.12, -96.615 · 93.0°
Loss budget · 10 GHz
FSPL (free-space)
156.8
dB
Gaseous (O₂ + H₂O)
1.1
dB
Diffraction
108.5
dB
Rain attenuation
0.0
dB
Total path loss
266.4
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
-266.4
dB
RX antenna gain
30.0
dBi
RX power
-188.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-48.4
dB
Path weather · HRRR average of 9 samples
Temperature
79.5 °F
26.4 °C
Dewpoint
43.7 °F
6.5 °C
T/Td gap
35.8 °F
19.9 °C
Abs. humidity
7.0
g/m³
Pressure
971.9
mb
PWAT
13.2
mm
BL depth
2297.1
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
33.2, -98.4
26.6 °C
4.7 °C
971.9 mb
2214.0
11.9 mm
—
13%
33.2, -98.2
26.9 °C
5.5 °C
981.1 mb
2268.8
12.6 mm
—
25%
33.2, -97.9
26.9 °C
4.1 °C
980.4 mb
2291.7
11.9 mm
—
38%
33.2, -97.7
27.0 °C
6.0 °C
986.7 mb
2365.7
13.4 mm
—
Midpoint
33.2, -97.5
25.2 °C
8.2 °C
983.8 mb
2295.4
13.2 mm
—
63%
33.2, -97.3
24.9 °C
9.5 °C
990.9 mb
2182.0
12.8 mm
—
75%
33.1, -97.1
24.4 °C
10.4 °C
997.5 mb
2345.3
15.1 mm
—
88%
33.1, -96.8
27.3 °C
6.2 °C
995.3 mb
2332.9
14.2 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 83
at 04:00 UTC
· low 69
at 01:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 77 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 77 | GOOD |
| 23:00 | 77 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 | 69 | GOOD |
| 02:00 | 70 | GOOD |
| 03:00 | 81 | EXCELLENT |
| 04:00 | 83 | EXCELLENT |
| 05:00 | 82 | EXCELLENT |
| 06:00 | 80 | EXCELLENT |
| 07:00 | 81 | EXCELLENT |
| 08:00 | 79 | GOOD |
| 09:00 | 79 | GOOD |
| 10:00 | 82 | EXCELLENT |
| 11:00 | 72 | GOOD |
| 12:00 · now | 76 | GOOD |