Distance
59.2
km · 36.8 mi
Bearing
32.0°
true · rev 212.0°
Terrain
BLOCKED
64.0 dB diffraction
Propagation
71/100
GOOD
Margin
+5.7
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 ≈ 34 m AGL at the midpoint (103 m above the chord, 52 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 21.1 m) clears with margin. The geometric line of sight is obstructed — buried 40 m below terrain at its worst point.
Great circle
32.669, -96.953 → 33.12, -96.615 · 32.0°
Loss budget · 10 GHz
FSPL (free-space)
147.9
dB
Gaseous (O₂ + H₂O)
0.4
dB
Diffraction
64.0
dB
Rain attenuation
0.0
dB
Total path loss
212.3
dB
Gas rate 0.0069 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 14.9 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
-212.3
dB
RX antenna gain
30.0
dBi
RX power
-134.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
5.7
dB
Path weather · HRRR average of 9 samples
Temperature
69.6 °F
20.9 °C
Dewpoint
63.8 °F
17.7 °C
T/Td gap
5.9 °F
3.3 °C
Abs. humidity
14.9
g/m³
Pressure
993.4
mb
PWAT
39.2
mm
BL depth
480.0
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, -96.9
22.4 °C
17.9 °C
997.1 mb
-59.1
505.2
38.6 mm
—
38%
32.8, -96.8
22.3 °C
17.4 °C
999.1 mb
-64.4
491.9
38.1 mm
—
Midpoint
32.9, -96.8
20.7 °C
17.6 °C
998.3 mb
-73.4
433.5
37.3 mm
—
63%
33.0, -96.7
19.7 °C
17.5 °C
993.4 mb
-63.8
482.7
37.7 mm
—
75%
33.0, -96.7
19.7 °C
17.5 °C
993.4 mb
-63.8
482.7
37.7 mm
—
88%
33.1, -96.7
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 mm
—
Destination
33.1, -96.6
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 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 |