Distance
74.4
km · 46.2 mi
Bearing
38.8°
true · rev 218.8°
Terrain
BLOCKED
77.3 dB diffraction
Propagation
71/100
GOOD
Margin
-9.7
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 ≈ 54 m AGL at the midpoint (163 m above the chord, 81 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 23.6 m) clears with margin. The geometric line of sight is obstructed — buried 81 m below terrain at its worst point.
Great circle
32.669, -96.953 → 33.189, -96.452 · 38.8°
Loss budget · 10 GHz
FSPL (free-space)
149.9
dB
Gaseous (O₂ + H₂O)
0.5
dB
Diffraction
77.3
dB
Rain attenuation
0.0
dB
Total path loss
227.7
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 15.0 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
-227.7
dB
RX antenna gain
30.0
dBi
RX power
-149.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-9.7
dB
Path weather · HRRR average of 9 samples
Temperature
69.4 °F
20.8 °C
Dewpoint
64.0 °F
17.8 °C
T/Td gap
5.3 °F
3.0 °C
Abs. humidity
15.0
g/m³
Pressure
996.8
mb
PWAT
39.6
mm
BL depth
477.0
m AGL
Refrac. gradient
-73.4
N/km
Propagation factors · 10 GHz
71/100
Rain
100
14%
Humidity
95
13%
PWAT
70
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
55
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.7, -97.0
22.3 °C
17.7 °C
996.8 mb
-53.8
507.0
44.6 mm
—
13%
32.7, -96.9
22.4 °C
17.9 °C
997.1 mb
-59.1
505.2
38.6 mm
—
25%
32.8, -96.8
22.4 °C
17.9 °C
997.1 mb
-59.1
505.2
38.6 mm
—
38%
32.9, -96.8
20.7 °C
17.6 °C
998.3 mb
-73.4
433.5
37.3 mm
—
Midpoint
32.9, -96.7
20.7 °C
17.6 °C
998.3 mb
-73.4
433.5
37.3 mm
—
63%
33.0, -96.6
19.7 °C
18.0 °C
998.0 mb
-71.9
438.2
38.7 mm
—
75%
33.1, -96.6
19.7 °C
18.0 °C
998.0 mb
-71.9
438.2
38.7 mm
—
88%
33.1, -96.5
18.9 °C
17.8 °C
998.4 mb
-65.0
431.7
40.8 mm
—
Destination
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 73
at 13:00 UTC
· low 64
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 69 | GOOD |
| 22:00 | 67 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 64 | MARGINAL |
| 03:00 | 68 | GOOD |
| 04:00 | 72 | GOOD |
| 05:00 | 70 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 68 | GOOD |
| 08:00 | 68 | GOOD |
| 09:00 | 68 | GOOD |
| 10:00 | 71 | GOOD |
| 11:00 | 72 | GOOD |
| 12:00 | 72 | GOOD |
| 13:00 · now | 73 | GOOD |