Star Microwave



Link Planner: Approximation of Bearing and LOS Distance based on GPS co-ordinates

	Deg	Min	Sec	Hemisphere	Dec Deg
Site A Latitude
Site A Longitude
Site B Latitude
Site B Longitude



Distance (km) A to B
Distance (mi) A to B
Bearing A to B		Bearing at A looking towards B
Bearing B to A		Bearing at B looking towards A

*Note 1:* It is important to enter the hemisphere, ex: N, E, S, W.
*Note 2:* Enter co-ordinates in deg, min, sec and the hemisphere. The decimal degrees will be calculated, and the sign will reflect the hemisphere (North and West will be positive, South and East negative)



Star Microwave - Radio Propagation Path Loss Calculator*

System Description
	Site A		Site B
Link Frequencies
Site Name
Date

Data Input
	Parameter	Symbol	Value	Units	Comments

System Parameters	Antenna feed loss	Af		dB	Outdoor Unit to Antenna Losses
	Operating Frequency	F		MHz
	Site A Antenna Gain	Gt		dBi	Yagi
	Transmitter Output Power	Pt		dBm	Measured at Outdoor Unit output
	Site B Antenna Gain	Ar		dBi
	Receiver Sensitivity			dBm	For BER=1e-6
	System Gain - Calculated

Link Parameters	Link Distance (km)	D		km	Line of sight distance
	Distance (miles) - Calculated	D		miles	LOS converted to miles

Link Availability	Climate Factor	Cf		Average
	Terrain Factor	tf		Mountainous


Calculated Output
Calculated Parameters	Link Fade Margin			dB
	Link Path Loss	Lp		dB
	Link Availability			%
	Link outage hrs/yr			hrs/yr
	Effective Radiated Power			dBm
	Received Signal Power	Pr		dBm

Link Planner: Fresnel Zone & Earth Curvature

Path lenght(km)

Fresnel zone factor

Tower 1 height(m)

Frequency(Ghz)

Tower 2 height(m)

Distance

Note 1: Earth Curvature is based on spherical earth model approximation with radius of 6371km.

Note 2: Atmospheric refraction causes the wavefront to bend towards the higher density region,this is model with a typical K-factor of 1.33.

Note 3: A Fresnel zone factor of 0.6 with clearance is required for good line sight reception.