Distance
214.4
km · 133.2 mi
Bearing
115.5°
true · rev 295.5°
Terrain
BLOCKED
123.4 dB diffraction
Propagation
78/100
GOOD
Margin
-66.0
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 ≈ 451 m AGL at the midpoint (1353 m above the chord, 676 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 40.1 m) clears with margin. The geometric line of sight is obstructed — buried 738 m below terrain at its worst point.
Great circle
33.966, -98.694 → 33.12, -96.615 · 115.5°
Loss budget · 10 GHz
FSPL (free-space)
159.1
dB
Gaseous (O₂ + H₂O)
1.5
dB
Diffraction
123.4
dB
Rain attenuation
0.0
dB
Total path loss
284.0
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.9 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
-284.0
dB
RX antenna gain
30.0
dBi
RX power
-206.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-66.0
dB
Path weather · HRRR average of 9 samples
Temperature
73.0 °F
22.8 °C
Dewpoint
59.9 °F
15.5 °C
T/Td gap
13.1 °F
7.3 °C
Abs. humidity
12.9
g/m³
Pressure
969.5
mb
PWAT
25.9
mm
BL depth
307.6
m AGL
Refrac. gradient
-97.7
N/km
Propagation factors · 10 GHz
78/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
68
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
55
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-15 08:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
34.0, -98.7
23.6 °C
15.0 °C
969.5 mb
-84.3
304.8
24.7 mm
—
13%
33.9, -98.4
23.2 °C
11.0 °C
972.9 mb
-60.0
299.7
24.4 mm
—
25%
33.8, -98.2
20.9 °C
14.2 °C
975.3 mb
-83.9
306.4
27.3 mm
—
38%
33.6, -97.9
22.5 °C
17.0 °C
971.8 mb
-91.0
318.8
29.7 mm
—
Midpoint
33.5, -97.7
21.3 °C
17.5 °C
975.1 mb
-83.2
314.3
29.4 mm
—
63%
33.4, -97.4
21.8 °C
17.7 °C
976.0 mb
-97.7
279.9
27.2 mm
—
75%
33.3, -97.1
23.3 °C
16.3 °C
985.6 mb
-85.8
353.9
25.3 mm
—
88%
33.2, -96.9
24.1 °C
14.8 °C
988.5 mb
-59.0
323.9
23.2 mm
—
Destination
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
Midpoint vertical profile
18-hour forecast · this path · 10 GHz
→ steady
Peak 80
at 12:00 UTC
· low 65
at 21:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 77 | GOOD |
| 09:00 | 79 | GOOD |
| 10:00 | 79 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 | 80 | EXCELLENT |
| 13:00 | 77 | GOOD |
| 14:00 | 79 | GOOD |
| 15:00 | 77 | GOOD |
| 16:00 | 74 | GOOD |
| 17:00 | 76 | GOOD |
| 18:00 | 80 | EXCELLENT |
| 19:00 | 70 | GOOD |
| 20:00 | 67 | GOOD |
| 21:00 | 65 | GOOD |
| 22:00 | 67 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 · now | 73 | GOOD |