Distance
233.0
km · 144.8 mi
Bearing
99.7°
true · rev 279.7°
Terrain
BLOCKED
125.0 dB diffraction
Propagation
68/100
GOOD
Margin
-68.4
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 ≈ 532 m AGL at the midpoint (1597 m above the chord, 799 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 41.8 m) clears with margin. The geometric line of sight is obstructed — buried 810 m below terrain at its worst point.
Great circle
33.498, -99.081 → 33.12, -96.615 · 99.7°
Loss budget · 10 GHz
FSPL (free-space)
159.8
dB
Gaseous (O₂ + H₂O)
1.6
dB
Diffraction
125.0
dB
Rain attenuation
0.0
dB
Total path loss
286.4
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 6.6 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
-286.4
dB
RX antenna gain
30.0
dBi
RX power
-208.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-68.4
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.1 °C
Dewpoint
42.2 °F
5.7 °C
T/Td gap
38.6 °F
21.5 °C
Abs. humidity
6.6
g/m³
Pressure
970.8
mb
PWAT
13.2
mm
BL depth
2288.4
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
68/100
Rain
100
14%
Humidity
70
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
10%
Refractivity
50
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-03 20:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.5, -99.1
26.9 °C
4.2 °C
970.8 mb
2283.3
11.9 mm
—
13%
33.5, -98.8
27.1 °C
5.6 °C
977.4 mb
2299.4
13.1 mm
—
25%
33.4, -98.5
27.1 °C
4.9 °C
975.7 mb
2264.0
12.1 mm
—
38%
33.4, -98.2
27.1 °C
3.6 °C
980.2 mb
2244.0
10.3 mm
—
Midpoint
33.3, -97.8
28.3 °C
5.6 °C
985.9 mb
2402.8
15.2 mm
—
63%
33.3, -97.5
26.0 °C
7.5 °C
985.4 mb
2259.3
13.2 mm
—
75%
33.2, -97.2
26.2 °C
9.6 °C
992.0 mb
2131.5
14.8 mm
—
88%
33.2, -96.9
27.3 °C
6.2 °C
995.3 mb
2332.9
14.2 mm
—
Destination
33.1, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 80
at 10:00 UTC
· low 65
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 75 | GOOD |
| 22:00 | 74 | GOOD |
| 23:00 | 67 | GOOD |
| 00:00 | 69 | GOOD |
| 01:00 | 67 | GOOD |
| 02:00 | 65 | GOOD |
| 03:00 | 77 | GOOD |
| 04:00 | 78 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 77 | GOOD |
| 08:00 | 78 | GOOD |
| 09:00 | 79 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 74 | GOOD |
| 12:00 · now | 74 | GOOD |