Distance
30.5
km · 19.0 mi
Bearing
245.3°
true · rev 65.3°
Terrain
BLOCKED
42.3 dB diffraction
Propagation
66/100
GOOD
Margin
+33.4
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 ≈ 9 m AGL at the midpoint (27 m above the chord, 14 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 15.1 m) clears with margin. The geometric line of sight is obstructed — buried 13 m below terrain at its worst point.
Great circle
33.304, -96.154 → 33.189, -96.452 · 245.3°
Loss budget · 10 GHz
FSPL (free-space)
142.1
dB
Gaseous (O₂ + H₂O)
0.2
dB
Diffraction
42.3
dB
Rain attenuation
0.0
dB
Total path loss
184.6
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
-184.6
dB
RX antenna gain
30.0
dBi
RX power
-106.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
33.4
dB
Path weather · HRRR average of 9 samples
Temperature
65.9 °F
18.9 °C
Dewpoint
63.6 °F
17.6 °C
T/Td gap
2.3 °F
1.3 °C
Abs. humidity
14.9
g/m³
Pressure
994.0
mb
PWAT
40.2
mm
BL depth
462.9
m AGL
Refrac. gradient
-87.1
N/km
Propagation factors · 10 GHz
66/100
Rain
100
14%
Humidity
95
13%
PWAT
50
11%
Season
68
11%
T-Td Depression
40
10%
Refractivity
68
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
33.3, -96.2
19.0 °C
18.0 °C
995.2 mb
-87.1
408.2
41.7 mm
—
13%
33.3, -96.2
18.4 °C
17.6 °C
994.0 mb
-61.0
424.8
39.3 mm
—
25%
33.3, -96.2
18.4 °C
17.6 °C
994.0 mb
-61.0
424.8
39.3 mm
—
38%
33.3, -96.3
18.4 °C
17.6 °C
994.0 mb
-61.0
424.8
39.3 mm
—
Midpoint
33.2, -96.3
18.4 °C
17.6 °C
994.0 mb
-61.0
424.8
39.3 mm
—
63%
33.2, -96.3
18.9 °C
17.4 °C
998.8 mb
-54.9
486.3
40.6 mm
—
75%
33.2, -96.4
18.9 °C
17.4 °C
998.8 mb
-54.9
486.3
40.6 mm
—
88%
33.2, -96.4
18.9 °C
17.4 °C
998.8 mb
-54.9
486.3
40.6 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 75
at 11:00 UTC
· low 62
at 21:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 62 | MARGINAL |
| 22:00 | 66 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 63 | MARGINAL |
| 01:00 | 64 | MARGINAL |
| 02:00 | 62 | MARGINAL |
| 03:00 | 65 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 67 | GOOD |
| 06:00 | 70 | GOOD |
| 07:00 | 69 | GOOD |
| 08:00 | 68 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 75 | GOOD |
| 12:00 | 75 | GOOD |
| 13:00 · now | 75 | GOOD |