?? voacap.gph
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VOACAP temporary GRAPH output parameter definitions (4nec2/fixed)
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ANGLE = Radiation angle (degrees)
Radiation Angle [degrees]
1. 0 6 5. 10. 15. 20. 30. 99.
ANGLER= Receiver Radiation angle (degrees)
Radiation Angle Receive [degrees]
1. 0 6 5. 10. 15. 20. 30. 99.
TANGLE= Radiation angle (degrees)
Radiation Angle Transmit [degrees]
1. 0 6 5. 10. 15. 20. 30. 99.
RANGLE= Receiver Radiation angle (degrees)
Radiation Angle Receive [degrees]
1. 0 6 5. 10. 15. 20. 30. 99.
DELAY = Time delay (milliseconds)
Time Delay [milliseconds]
1. 2 0
VHITE = Virtual height (km)
Virtual Height [km]
1. 0 6 100. 200. 300. 400. 500. 10000.
FDAYS = % of days/month sky-wave propagation expected
F_Days expected [%]
100. 0 6 1. 20. 50. 80. 90. 110.
MUFday= % of days/month sky-wave propagation expected at MUF mode
MUF days expected [%]
100. 0 6 1. 10. 50. 90. 99. 110.
LOSS = Median system loss (dB)
System Loss Median [dB]
1. 3 2 10. 300.
DBU = Median field strength at receive location (dBu)
Field Strength Median [dBu]
1. 0 6 -12. 0. 12. 24. 44. 99.
TGAIN = Transmitter Antenna Gain (dB)
Transmitter Antenna Gain [dB]
1. 1 2 3. -30.
RGAIN = Receiver Antenna Gain (dB)
Receiver Antenna Gain [dB]
1. 1 2 3. -30.
SDBW = Median signal power at receiver (dBW)
Signal Power at Receiver [dBW]
1. 0 6 -139. -127. -115. -103. -83. -9.
NDBW = Median noise power at receiver (dBW)
Noise Power at Receiver [dBW]
1. 0 6 -169. -163. -157. -151. -145. -99.
SNR = Median signal-to-noise ratio (dB)
Signal-to-Noise Median Decile [dB]
1. 0 6 30. 45. 55. 67. 80. 999.
SNRxx = Signal-to-Noise ratio (dB) at Req. Rel.
Signal-to-Noise at Req. Rel. [dB]
1. 0 6 49. 59. 65. 73. 86. 999.
SNR90 = Lower Decile Signal-to-Noise ratio (dB)
Signal-to-Noise Lower Decile [dB]
1. 1 2 5. 0.
RPWRG = Required power & antenna gain to achieve reliab (dB)
Required Power & Antenna Gain [dB]
1. 3 2 10. 200.
REL = Time availability, % time SNR exceeds required SNR
Time availability SNR > Req SNR [%]
100. 0 6 10. 30. 50. 70. 90. 110.
MPROB = Probability additional mode in multipath tolerances
Probability Multipath [%]
100. 0 6 1. 20. 50. 80. 90. 110.
SPRB = Service probability, required reliabilty will be met
Service Probability [%]
100. 0 6 1. 20. 50. 80. 90. 110.
SIGLW = Lower decile signal pwr (field strength & loss) (dB)
Signal Power Lower Decile [dB]
1. 2 0
SIGUP = Upper decile signal pwr (field strength & loss) (dB)
Signal Power Upper Decile [dB]
1. 2 0
VHFDBU= VHF median field strength (dBu)
VHF Median Field Strength [dBu]
1. 2 0
VHFLW = VHF lower decile increment (dB)
VHF LW Lower Decile [dB]
1. 2 0
VHFUP = VHF upper decile increment (dB)
VHF UP Upper Decile [dB]
1. 2 0
SNRLW = Lower decile SNR increment (dB)
SNR LW Lower Decile [dB]
1. 2 0
SNRUP = Upper decile SNR increment (dB)
SNR UP Upper Decile [dB]
1. 2 0
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