SOURCEFORGE » RALF » 2014 SatLinkTool : a tool for analysing geo satcom

h1. Tests and results

The aim of this part is to demonstrate the proper functioning of the tool. That is, the explanation of how we have shown that the results of all the link budget operations are correct, as well as that the tool is understandable for a user who has never used before.

For that purpose, different test with other students have been carried out. Thus, it has been possible to identify the difficulties of understanding of some aspects. For instance, we have identified some hesitation to understand well what refers each input parameter, and so we could take steps to correct it, and add more explanation in the popup help, or add some diagrams blocks in some tabs in order to have an extra visual aid of the correct placement of each parameter in the process.

h2. Checking results

Below are shown the different verification carried out in each tab in order to verify the correct computation implementation.

h3.Payload

h3. Services

tip. libro y proyecto 2

h3.  System Geometry

p=. !{width: 50%}Geometry_ES_Palmeira.png!

p=. !{width: 50%}Geometry_ES_Roma.png!

p=. !{width: 75%}Geometry_test.png!

h3. Uplink

tip. ejemplos libro 5.4.2 y 5.6.2

h3. Payload

In the payload we have two windows menu. The first is the Antenna and the second the transponder. The window antenna, in turn, has the Depointing 1 and Depointing 2 window. Only the first calculations of depointing were performed in the application, being the total depointing angle an point to be performed in further implementations of _SatLinkTool_. In thhese first calculations, we have performed the _true view angles_ ($\theta$, $\phi$), _the satellite antenna azimuth angle_ ($\alpha$)  and _satellite antenna elevation angle_ ($\beta$), as well as  two auxiliary angles $\alpha * $, $\beta * $. The objective of take this values is to implement in total depointing angle perform.   

p=. !{width: 110%}antennaresult1.png!  

 

<div style="margin-left: auto; margin-right: auto; width: 50em">*Figure 2* - Gain and losses from a signal travelling from a transmitter to a receiver, considering individual uplink path. *P* is the power before the transmitter      amplifier, *Gain* is the transmitter amplifier gain, *PR* is the power received, *Loss 1* the power lost due to the transmitter equipment, *Loss 2*  the power lost due to the atmosphere effects, *Loss 3* the power lost due to the receiver equipment.

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h3. Downlink

tip. ejemplos libro 5.4.3 y 5.6.3

h3. Overall link

h1 References

http://www.eutelsat.com/ (Azimuth and Elevation angles)