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Waas signal

Old 05-05-2003, 02:59 AM
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Default Waas signal

Last week I was out on my boat for the first time this season and I noticed my Lowrance Globalnav 2400 lost the waas signal momentarily a few times.Has anyone else had this promblem?
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Old 05-05-2003, 04:57 AM
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Default Waas signal

I don't usually check the status of my signals, but when I do I've noticed it 'searching for WAAS' more often than not. I get it sometimes but always have good strength on my regular satellites. I think of it as a bonus when it works and don't think much about it when it doesn't.

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Old 05-05-2003, 05:24 AM
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Default Waas signal

It does happen occasionally. If I remember right, just one satalite sets up the WAAS signal. (Number 23?) http://www.navcen.uscg.gov/ Read all about.

Boston Whaler, "MUMBLER", 24' Outrage, twin 175 HP Evinrude Ocean Pros. Snowball, the cat...
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Old 05-05-2003, 08:46 AM
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Default Waas signal

According to Garmin's literature, there are two WAAS Sat's available to the US. One is for the pacific and one for the atlantic. They are both over the equator.
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Old 05-05-2003, 09:15 AM
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Default Waas signal

Waas is being developed for aircraft use and as such it's application in marine use is not 100%.

The Waas satilites are #31 and above and are very low,if not right on the horizon up here in the north. And are easily blocked.in marine applications.DGPS is the system developed for marine use.With it's correction data broadcast over selected loran beacons.It requires a dipole antenna and receiver and is connected to the gps system thur a serial port connect.

The Wass system requires no addtional equipment and is done with software in the gps receiver.Most GPS antennas are now the small doam mushroom shape-which are flat patch antennas. They have a very hard time seeing the satilites low in the sky !!! The older 4-10" tall vertcle GPS antennas were helix dipole type and received the low in sky satilites much better,but cost more to produce.

Wass is great when it can be recieved,but you must not count on it to be there all the time,and thats why there is DGPS- it is there 99% of the time.
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Old 05-05-2003, 02:42 PM
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Default Waas signal

In the three years I've had a WAAS device, I have NEVER seen it loose it. That doesn't mean I have never lost it, but it does mean it's VERY rare.

I also now have a Garmin Rhino radio/WAAS GPS handheld. I drive with it in the truck, boat..... it has never lost the WAAS fix.

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Old 05-05-2003, 03:30 PM
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Default Waas signal

The WAAS satellite is #35 for the Eastern US and is positioned over Brasil. I have never lost #35 from South Florida.
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Old 05-05-2003, 06:44 PM
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Default Waas signal

Ya...that's what I said; #35!

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Old 05-05-2003, 07:00 PM
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Default Waas signal

quote:Originally posted by Mumblerone:
Ya...that's what I said; #35!



Garmin call that satellite #35 (I believe that's the NMEA convention), but other manufacturers (e.g. Furuno) may refer to it by its PRN which is 122. I do not know which number Lowrance uses.

Ed
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