Distance
97.7
km · 60.7 mi
Bearing
196.9°
true · rev 16.9°
Terrain
BLOCKED
96.5 dB diffraction
Propagation
67/100
GOOD
Margin
-31.5
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 ≈ 94 m AGL at the midpoint (281 m above the chord, 141 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.1 m) clears with margin. The geometric line of sight is obstructed — buried 171 m below terrain at its worst point.
Great circle
34.03, -96.146 → 33.189, -96.452 · 196.9°
Loss budget · 10 GHz
FSPL (free-space)
152.2
dB
Gaseous (O₂ + H₂O)
0.7
dB
Diffraction
96.5
dB
Rain attenuation
0.0
dB
Total path loss
249.5
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.9 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
-249.5
dB
RX antenna gain
30.0
dBi
RX power
-171.5
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-31.5
dB
Path weather · HRRR average of 9 samples
Temperature
81.6 °F
27.6 °C
Dewpoint
47.0 °F
8.3 °C
T/Td gap
34.6 °F
19.2 °C
Abs. humidity
7.9
g/m³
Pressure
990.5
mb
PWAT
17.1
mm
BL depth
2329.0
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
67/100
Rain
100
14%
Humidity
82
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
10%
Refractivity
50
10%
Pressure
70
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
34.0, -96.1
27.0 °C
11.3 °C
994.9 mb
2300.2
18.3 mm
—
13%
33.9, -96.2
27.2 °C
10.8 °C
997.5 mb
2322.6
18.2 mm
—
25%
33.8, -96.2
26.7 °C
10.5 °C
996.3 mb
2291.1
18.3 mm
—
38%
33.7, -96.3
27.9 °C
9.3 °C
998.0 mb
2326.7
17.7 mm
—
Midpoint
33.6, -96.3
27.4 °C
9.7 °C
993.6 mb
2363.3
19.0 mm
—
63%
33.5, -96.3
27.6 °C
5.7 °C
990.5 mb
2275.6
15.0 mm
—
75%
33.4, -96.4
28.2 °C
5.3 °C
992.4 mb
2409.5
16.3 mm
—
88%
33.3, -96.4
28.4 °C
7.3 °C
997.4 mb
2380.9
17.1 mm
—
Destination
33.2, -96.5
27.6 °C
4.8 °C
995.4 mb
2290.7
13.7 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 81
at 11:00 UTC
· low 66
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 72 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 73 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 66 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 78 | GOOD |
| 06:00 | 78 | GOOD |
| 07:00 | 78 | GOOD |
| 08:00 | 77 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 79 | GOOD |
| 11:00 | 81 | EXCELLENT |
| 12:00 · now | 80 | EXCELLENT |