Dual Pro 360 after a week of owning it (1 Viewer)

antennahead

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Question for you guys. My GPS seems to drop coverage in spots. The suburban area I live in has some two lane roads that are lined with old oak trees, and in many cases they make a canopy and cover the road. The foliage is pretty dense. Is it normal when driving in this terrain for the GPS to lose the satellite? My speed detection will drop to "0", then the screen will go blank, when I clear the trees it comes back. Detector is installed with a Blendmount. There is a small amount of plastic where the mirror joins the windshield above the detector, but for the most part it's pretty open to the windshield. The Nav in my previous car never lost contact in this area, however I would lose Sirrius/XM satellite coverage under these trees. Thanks.
 

antennahead

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Very normal my friend! Thick foliage, tunnels, parking garages can impair GPS reception.
Thanks so much. I was a little worried about my Blendmount impacting it, after reading tales of such :) , but since the reception seemed ok when out of the trees, I think I'm ok with the mounting ......... which I like alot. I have a digital speed readout right in the middle of the tach, so I typically leave the detector set to monitor the battery voltage. I only switched it to "current speed" to actually verify the GPS was working. Repeating what others have noticed, this thing is so quiet in Auto mode, I rarely even get the false from a strip center door or alarm. Because of that, I can see me not having to manually lockout too many falses. Looking for some more "seat time" in the car encountering some real threats. I guess I'm also suffering from "new detector-itis" ............. minimal encounters so far ;)
 

antennahead

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OK, more GPS questions, sorry. I've owned detectors all my adult life, over 30 years, all Escorts and Bel products. My previous ride had an 8500 Ci that I installed myself back in 2011...... this DP360 is my first detector with GPS. I'm familiar with how GPS works, but no ownership experience detector wise. The GPS behavior/connectivity of this unit is very erratic. My previous post mentioned no coverage on the road that was covered by trees. I drove that route again today to the gym ......... no GPS the entire time. I get to the strip center, there is ZERO blockage and no cloud cover, but I'm still getting no GPS. I park, go do my workout, come back to the car, turn on the detector and then proceed to drive down the highway to Walmart to pick up a few things. About 2 to 3 minutes into this part of the trip, current speed suddenly shows up, so I know I now have GPS. Get to Walmart, notice K band alert is greyed out .......... as it should be from my manual lockout the other day when I was there. Get back in the car after shopping, GPS comes up immediately after turning on the detector. Now here's the interesting part, it stays on .......... and when I turn onto the two lane road with all the trees, I keep GPS connectivity for the entire trip home.

Are these thing this wonky with GPS connectivity? Is this a case of the detector taking a few minutes to lock onto a bird, and if I get under the tree canopy too soon, it never locks signal? But if I'm locked onto GPS prior to the tree canopy road, it stays locked? I'm wondering if I have an intermittent issue with the detector. From my home to the tree lined road is easily a 3 minute drive, and I didn't connect today or previously on that route, nothing to block the reception. Thanks in advance for any feedback/experience you care to share.

Update to post:
I ran across this post here from 2015 in my research:

"12.5 minutes is the amount of time it takes to download the full GPS almanac from one satellite. If the radesno doesn't store the almanac in non-volatile memory, it would have to be re-aquired on each reboot. The more satellites it can receive, the faster it will download and get a lock. So if you're only able to receive one satellite reliably, it will take the full 12.5 minutes if the almanac isn't stored from before. Most handheld GPS receivers store the almanac (which is valid for about 180 days), the last location fix before power off, and the time, so when they are powered on they just have to download the ephemeris data which only takes about 30 seconds (warm fix)."

Could this also be my issue? Am I "re-acquiring" data each time I turn the unit on?
 
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