Distance
148.6
km · 92.3 mi
Bearing
160.6°
true · rev 340.6°
Terrain
BLOCKED
101.8 dB diffraction
Propagation
69/100
GOOD
Margin
-40.7
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 ≈ 217 m AGL at the midpoint (650 m above the chord, 325 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 33.4 m) clears with margin. The geometric line of sight is obstructed — buried 265 m below terrain at its worst point.
Great circle
34.382, -97.145 → 33.12, -96.615 · 160.6°
Loss budget · 10 GHz
FSPL (free-space)
155.9
dB
Gaseous (O₂ + H₂O)
1.0
dB
Diffraction
101.8
dB
Rain attenuation
0.0
dB
Total path loss
258.7
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.3 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
-258.7
dB
RX antenna gain
30.0
dBi
RX power
-180.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-40.7
dB
Path weather · HRRR average of 9 samples
Temperature
81.1 °F
27.3 °C
Dewpoint
44.9 °F
7.2 °C
T/Td gap
36.3 °F
20.1 °C
Abs. humidity
7.3
g/m³
Pressure
972.6
mb
PWAT
15.2
mm
BL depth
2292.2
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
34.4, -97.1
26.2 °C
8.8 °C
972.6 mb
2229.0
15.2 mm
—
13%
34.2, -97.1
27.0 °C
8.0 °C
986.9 mb
2312.6
14.1 mm
—
25%
34.1, -97.0
27.9 °C
6.7 °C
985.1 mb
2320.6
14.1 mm
—
38%
33.9, -96.9
27.5 °C
8.2 °C
991.3 mb
2297.8
18.0 mm
—
Midpoint
33.8, -96.9
27.0 °C
8.3 °C
990.1 mb
2229.3
15.8 mm
—
63%
33.6, -96.8
27.3 °C
7.3 °C
988.6 mb
2190.0
15.1 mm
—
75%
33.4, -96.7
26.7 °C
6.0 °C
990.1 mb
2235.9
13.8 mm
—
88%
33.3, -96.7
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 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 81
at 10:00 UTC
· low 72
at 03:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 74 | GOOD |
| 21:00 | 75 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 76 | GOOD |
| 01:00 | 75 | GOOD |
| 02:00 | 77 | GOOD |
| 03:00 | 72 | GOOD |
| 04:00 | 78 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 78 | GOOD |
| 08:00 | 78 | GOOD |
| 09:00 | 80 | EXCELLENT |
| 10:00 | 81 | EXCELLENT |
| 11:00 | 80 | EXCELLENT |
| 12:00 | 75 | GOOD |
| 13:00 · now | 75 | GOOD |