Distance
98.5
km · 61.2 mi
Bearing
106.4°
true · rev 286.4°
Terrain
BLOCKED
83.0 dB diffraction
Propagation
70/100
GOOD
Margin
-18.0
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 ≈ 95 m AGL at the midpoint (286 m above the chord, 143 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.2 m) clears with margin. The geometric line of sight is obstructed — buried 85 m below terrain at its worst point.
Great circle
33.374, -97.63 → 33.12, -96.615 · 106.4°
Loss budget · 10 GHz
FSPL (free-space)
152.3
dB
Gaseous (O₂ + H₂O)
0.7
dB
Diffraction
83.0
dB
Rain attenuation
0.0
dB
Total path loss
236.0
dB
Gas rate 0.0070 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
-236.0
dB
RX antenna gain
30.0
dBi
RX power
-158.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-18.0
dB
Path weather · HRRR average of 9 samples
Temperature
68.7 °F
20.4 °C
Dewpoint
63.8 °F
17.6 °C
T/Td gap
4.9 °F
2.7 °C
Abs. humidity
14.9
g/m³
Pressure
980.1
mb
PWAT
40.8
mm
BL depth
632.9
m AGL
Refrac. gradient
-63.7
N/km
Propagation factors · 10 GHz
70/100
Rain
100
14%
Humidity
95
13%
PWAT
50
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
55
10%
Pressure
82
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
33.4, -97.6
19.8 °C
17.1 °C
980.1 mb
-54.7
776.9
40.5 mm
—
13%
33.3, -97.5
20.3 °C
17.2 °C
987.0 mb
-49.1
815.1
38.8 mm
—
25%
33.3, -97.4
20.9 °C
17.5 °C
989.2 mb
-55.5
639.6
40.6 mm
—
38%
33.3, -97.2
21.2 °C
17.4 °C
992.9 mb
-53.3
648.0
41.1 mm
—
Midpoint
33.2, -97.1
22.1 °C
17.6 °C
994.1 mb
-49.4
687.6
42.0 mm
—
63%
33.2, -97.0
20.4 °C
18.0 °C
995.5 mb
-51.5
636.7
42.0 mm
—
75%
33.2, -96.9
19.9 °C
18.3 °C
996.2 mb
-56.2
569.4
41.7 mm
—
88%
33.2, -96.7
19.5 °C
17.9 °C
992.5 mb
-63.7
466.5
40.1 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 79
at 13:00 UTC
· low 62
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 67 | GOOD |
| 22:00 | 66 | GOOD |
| 23:00 | 70 | GOOD |
| 00:00 | 66 | GOOD |
| 01:00 | 66 | GOOD |
| 02:00 | 62 | MARGINAL |
| 03:00 | 68 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 67 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 74 | GOOD |
| 08:00 | 70 | GOOD |
| 09:00 | 75 | GOOD |
| 10:00 | 75 | GOOD |
| 11:00 | 75 | GOOD |
| 12:00 | 75 | GOOD |
| 13:00 · now | 79 | GOOD |