This appendix is intended for users of tripod-mounted portable satellite Internet systems, who use Apple Macintosh computers.
Satellite Finder is a Java program that locates the relative positions of geostationary satellites for provided positions on Earth. It will give you the azimuth, elevation, and skew values that you need to know, so you can set up your satellite dish. Make sure you have a copy of Satellite Finder (SatFinder.jar) on your computer’s hard drive.
Satellite Finder is available as a free download at:
http://vps.arachnoid.com/satfinder/index.html
Satellite Finder requires a Java 1.4 or newer runtime engine, which must already be installed.
Just double-click Satellite Finder (SatFinder.jar) to run it. When you do this the first time, the program will create a set of data files, which will speed up the computation of satellite positions based on US states/cities and ZIP codes. It will also create a configuration file that lists the satellites of interest and their orbital positions.This data file creation task only happens once, so subsequent program starts are much faster than the first.
You can search for and edit the text file called .SatFinder\satlist.txt , to only include those satellites of interest. By default, it will show all known satellites. In the example shown above, the file has been edited to only show the satellites used by StarBand.
After double-clicking SatFinder to execute it, you can enter your current position in one of three ways:
Once a position has been entered, Satellite Finder produces a list of satellites and their azimuth, elevation, and skew or polarization angles for the entered position. Both true and magnetic azimuth are computed for each satellite in the list.
The satellite data list can be copied onto the system clipboard for use elsewhere. Just point your mouse at the list, press the right mouse button, and choose Copy.
Note that in the graphic on the previous page, the results shown are for San Francisco, CA, zip code 94134. When setting up a HughesNet dish, the values are used directly as provided by Satellite Finder.
However, to use the provided skew (polarization) value for StarBand, a simple arithmetic translation must be made: Just subtract the supplied skew value from 90. Anytime you are east of the assigned satellite, the skew value provided will be a positive number. If you are west of the assigned satellite, the skew value provided will be negative. For G27/129, you will always be east of the satellite in the continental US.
Two examples are shown below, which use the AMC4/101 and G27/129 values shown in the previous graphic:
AMC4/101 => 90 - Skew = 90 - (-25.3) = 90 + 25.3 = 115.3
G27 /129 => 90 - Skew = 90 - 8.4 = 81.6
Therefore, on a HughesNet dish in San Francisco, with a satellite assignment of AMC4, you would set the skew to -25.3. However, on a StarBand dish in the same location, you would set it to 115.3. For a G27 assignment, you would set it to 8.4 for Hughesnet, but 81.6 for StarBand.
These numbers are provided purely to illustrate how to use Satellite Finder and do not necessarily represent actual satellite assignments.
Before you start, you should have installed a copy of Gary Villere’s SatTool for the Macintosh. SatTool is the Mac equivalent of the DSSatTool for Windows users. It is used to write the location (longitude and latitude) information to the modem’s firmware. Please see Chapter 2 for information about when to use either version.
SatTool is shareware available at: http://home.earthlink.net/~garyvillere/sattool/.
See the web site referenced above for more information about downloading, installing, and using this tool. There is no charge to download this utility and try it out, but please make a donation to the site, if you continue to use it.
SoftOPI is a Mac OS application that's a software replacement for the HughesNet Outdoor Pointing Interface (OPI), a simple signal strength meter. There is also PC-OPI, which is a version of this tool for Windows users. Please see Chapter 2 for information about when to use either version.
SoftOPI is available at: http://www.andybaird.com/software/softopi/index.htm.
See the web site referenced above for more information about downloading, installing, and using this tool. There is no charge to download this shareware and try it out, but please pay for it, if you continue to use it.
Here are the steps for getting online in a new location, using your Macintosh. For more information, please review the corresponding information for a Windows PC, in Chapter 2:
Remember that if you run and fail any cross-pol test, you will not be able to get online until you pass an automatic cross-pol (ACP) test, using Antenna Pointing or Registration - Installer .
This section contains information about Macintosh networking functions, including the following:
To view the Network Preferences , click the Apple icon and select System Preferences from the drop-down menu. Click the Network icon. To see the available connections, set the Location pull-down menu to Automatic and the Show pull-down menu to Network Status .
What you want is a green indicator for the connection you are using (Ethernet or AirPort) and a red indicator for everything else. You will see a screen similar to that shown above, on the right. Note that the Ethernet connection shows a green light, which means it is active.
You can use your powerbook to share the Internet connection with other wireless computers. Here are the steps to accomplish this:
You may wish to also click the AirPort Options... button and create a WEP or WPA password for the wireless network you are creating.
When you have finished these settings, click the Start button.If the Airport icon doesn’t appear in the menu extras list, here is how to add it:
Here is how to turn off the Apple Airport:
If it doesn’t appear, follow the steps in the previous topic.
Here are the steps for configuring your Macintosh to use dynamic IP addressing:
Here are the steps for configuring your Macintosh to use static IP addressing:
If you configure your Macintosh to connect to your Nova modem when it is offline, be sure you set the IP addressing back to automatic (DHCP) when you are back online. Otherwise, you will not be able to browse the web. In most case, even when you have an assigned static IP address, you can still use dynamic IP addressing without problems.