Skip to content
NTMS Propagation Path calculator

Path Calculator

Point-to-point prediction over HRRR profiles, SRTM terrain and ITU-R P.676 / P.530.

32.9, -96.5 · EM12sv · 8.0 ft AGL

33.1, -96.6 · EM13qc · 60.0 ft AGL
A callsign resolves through QRZ's mailing address, then geocoding — the position may be off from where the station actually operates.
Band
Station

Path calculation complete.

HRRR 08:00z · 9/9 path points
Distance
28.2
km · 17.5 mi
Bearing
332.8°
true · rev 152.8°
Terrain
FRESNEL_MINOR
0.0 dB diffraction
Propagation
62/100
MARGINAL
Margin
+67.6
dB over CW threshold
Terrain profile · SRTM 30 m + canopy + MS footprints
Line of sight 1st Fresnel Duct layer
Great circle
32.894, -96.477 → 33.12, -96.615 · 332.8°
Loss budget · 24 GHz
FSPL (free-space) 149.0 dB
Gaseous (O₂ + H₂O) 1.4 dB
Rain attenuation 0.0 dB
Total path loss 150.4 dB
Gas rate 0.0489 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 14.5 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 -150.4 dB
RX antenna gain 30.0 dBi
RX power -72.4 dBm
Sensitivity (CW, 500 Hz) -141.0 dBm
Margin 67.6 dB
Path weather · HRRR average of 9 samples
Temperature
73.7 °F
23.2 °C
Dewpoint
63.3 °F
17.4 °C
T/Td gap
10.4 °F
5.8 °C
Abs. humidity
14.5
g/m³
Pressure
987.4
mb
PWAT
22.9
mm
BL depth
270.6
m AGL
Refrac. gradient
-100.3
N/km · super-refractive
Propagation factors · 24 GHz 62/100
Rain
100 14%
Humidity
0 13%
PWAT
60 11%
Season
47 11%
T-Td Depression
60 10%
Refractivity
72 10%
Pressure
82 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 32.9, -96.5 24.4 °C 18.3 °C 995.2 mb -94.6 347.0 23.8 mm —
13% 32.9, -96.5 24.4 °C 18.3 °C 995.2 mb -94.6 347.0 23.8 mm —
25% 33.0, -96.5 21.7 °C 18.0 °C 992.9 mb -100.3 231.8 23.0 mm —
38% 33.0, -96.5 21.7 °C 18.0 °C 992.9 mb -100.3 231.8 23.0 mm —
Midpoint 33.0, -96.5 21.7 °C 18.0 °C 992.9 mb -100.3 231.8 23.0 mm —
63% 33.0, -96.6 22.2 °C 17.8 °C 991.0 mb -90.0 245.8 23.3 mm —
75% 33.1, -96.6 24.1 °C 16.0 °C 987.4 mb -91.5 266.6 22.0 mm —
88% 33.1, -96.6 24.1 °C 16.0 °C 987.4 mb -91.5 266.6 22.0 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 · 24 GHz → steady
Propagation score for this path over the next 18 hours. 0 25 50 75 100
Peak 65 at 10:00 UTC · low 57 at 00:00 UTC
Hour-by-hour propagation score for this path — the series plotted above.
Hour UTC Score Rating
08:00 63 MARGINAL
09:00 58 MARGINAL
10:00 65 GOOD
11:00 61 MARGINAL
12:00 60 MARGINAL
13:00 62 MARGINAL
14:00 62 MARGINAL
15:00 60 MARGINAL
16:00 58 MARGINAL
17:00 59 MARGINAL
18:00 59 MARGINAL
19:00 62 MARGINAL
20:00 62 MARGINAL
21:00 62 MARGINAL
22:00 61 MARGINAL
23:00 59 MARGINAL
00:00 57 MARGINAL
01:00 · now 58 MARGINAL