[gps-talkusers] Re: e: My Latest Experience with GPS
- From: "Kevin Chao" <g.unit89@xxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Mon, 15 Oct 2007 15:04:08 -0700
The higher the amount of channels means the more satellites that you are
able to track at any one given time, in GPS terms this is called "parallel
tracking." I have found through personal experience that the M-1000 that has
32 channels will track in the range of 10-12 satellites quite frequentley
while the GPSlim236 using the SIRF STAR III will track in the range of 8-10
satellites quite frequentley. I think the thing to really pay attention to
is the sensativity and battery life of the recievers as there really is only
a maximum of 12 satellites that are viewable at any point in time.
If you wish to continue this discussion, please send me a private message
at: g.unit89@xxxxxxxxxxxxx
I am sure this is more than many wanted to know.
Kevin
----- Original Message -----
From: "Scott Granados" <gsgranados@xxxxxxxxxxx>
To: <gps-talkusers@xxxxxxxxxxxxx>
Sent: Monday, October 15, 2007 2:54 PM
Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
> So what are they doing with the extra channels? Could you explain if it's
> not off topic a little on how the number of channels improves the
> functionality. Do the birds broadcast more data on more channels or
> what's the deal?:) What does 12 do and what does 20 offer that 12 doesn't
> and 32? Thanks!
>
>
> Thanks
>
> ----- Original Message -----
> From: "Kevin Chao" <g.unit89@xxxxxxxxxxxxx>
> To: <gps-talkusers@xxxxxxxxxxxxx>
> Sent: Monday, October 15, 2007 2:52 PM
> Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
>
>
>> You are correct in the TTF (time to first fix). The newer recievers that
>> are using the MTK chipset that were introduced towards the end of last
>> year now have 32 channels. Here is what has what in terms of Sendero past
>> receivers:
>> Earthmate Blue Logger, SIRF STAR II, 12 channels
>> Holux GPSlim236, SIRF STAR III, 20 channels
>> Holux M-1000, MTK, 32 channels
>>
>> All of this information along with the TTF can be found in their
>> respective user guide.
>>
>> I didn't list recievers beyond this because I am not sure what they are.
>>
>> Kevin
>> ----- Original Message -----
>> From: "Scott Granados" <gsgranados@xxxxxxxxxxx>
>> To: <gps-talkusers@xxxxxxxxxxxxx>
>> Sent: Monday, October 15, 2007 1:45 PM
>> Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
>>
>>
>>> Actually, and someone please pipe in if I'm way off but the channel
>>> numbers are 12 or 20. The us-globalsat 338 and 358 are 20 channel
>>> units.
>>> As for the time to fix remember there are different start states for
>>> your receiver so when you power up you may or may not enter a given
>>> start state. A new fix I.E. starting the unit up for the first time
>>> takes a few seconds. Around 40 sounds average. However, from a hot
>>> start state you can sync up in sub 1 second depending. So your time to
>>> aquizition will vary.:)
>>>
>>> ----- Original Message -----
>>> From: "Ken Perry" <kperry@xxxxxxxxxxxxx>
>>> To: <gps-talkusers@xxxxxxxxxxxxx>
>>> Sent: Monday, October 15, 2007 9:59 AM
>>> Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
>>>
>>>
>>>>
>>>>
>>>> Nod this helps I use the BT 338 and it is rated at 38 seconds but I
>>>> find
>>>> along with the reviews I have read on line I get a fix with in 2 to 3
>>>> seconds. So I was wondering how they could get faster. I think its
>>>> more
>>>> important to look for the channels which I think is 32 on the Holux
>>>> m-1000
>>>> where the BT 338 only has 20. I wonder though if it is better than the
>>>> BT
>>>> 338 though because they say the BT can pick up signals as low as 13 DB
>>>> from
>>>> satellites when normal gps receivers are rated at no lower than 20 db.
>>>> I
>>>> couldn't find the db rating for the Holux does it say in the manual? I
>>>> will
>>>> go see if I can find it on line.
>>>>
>>>> Ken
>>>>
>>>> -----Original Message-----
>>>> From: gps-talkusers-bounce@xxxxxxxxxxxxx
>>>> [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Chris
>>>> Grabowski
>>>> Sent: Monday, October 15, 2007 9:05 AM
>>>> To: gps-talkusers@xxxxxxxxxxxxx
>>>> Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
>>>>
>>>> Hi,
>>>> According to the manual the Holux m-1000 cold start is rated at 36
>>>> seconds.
>>>> The majority of the time, I turn on my m-1000 then the bn then enter
>>>> GPS.
>>>> I normally have a fix quite rapidly after that.
>>>> Hope this helps.
>>>> Chris
>>>> On Mon, 15 Oct 2007 08:45:02 -0700, "Ken Perry" <kperry@xxxxxxxxxxxxx>
>>>> wrote:
>>>>
>>>>>
>>>>>
>>>>>I have seen a few posts about the holux m-1000 and that it would cause
>>>>>better boot up speeds. I am currently not using the Sendero GPS
>>>>>product and am interested in how long it takes for most people to get
>>>>>connected with the satellite.
>>>>>
>>>>>Ken
>>>>>
>>>>>-----Original Message-----
>>>>>From: gps-talkusers-bounce@xxxxxxxxxxxxx
>>>>>[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of richard
>>>>>synnott
>>>>>Sent: Monday, October 15, 2007 2:23 AM
>>>>>To: gps-talkusers@xxxxxxxxxxxxx
>>>>>Subject: [gps-talkusers] e: My Latest Experience with GPS
>>>>>
>>>>>Hi Joleen,
>>>>>what receiver are you using?
>>>>>if you're not currently using the holux m-1000, I'm sure this would
>>>>>improve things greatly regarding sattellite tracking, accuracy and
>>>>>boot-up time if you were to acquire one.
>>>>>On the other hand, if you are using the m-1000, I don't know what to
>>>>>suggest other than to say it sounds like a mapping problem.
>>>>>Don't give up, though.
>>>>>All the bestst, Richard.
>>>>>
>>>>>> ----- Original Message -----
>>>>>>From: Joleen <cjferg@xxxxxxxxxxx
>>>>>>To: gps-talkusers@xxxxxxxxxxxxx
>>>>>>Date: Sun, 14 Oct 2007 18:08:36 -0700
>>>>>>Subject: [gps-talkusers] My Latest Experience with GPS
>>>>>
>>>>>>Hi All,
>>>>>
>>>>>>Let me share my latest experience with GPS.
>>>>>
>>>>>>Yesterday I was traveling to a camp site where my driver had forgotten
>>>>>>to bring his map.
>>>>>
>>>>>>With a sense that I could be of real help, I took out my GPS and
>>>>>>created a route from Yakima to Camp Ghormley. I was able to give
>>>>>>directions. At one point, we turned onto a gravel road. It turned
>>>>>>out to be a very poor road with wash-out areas. After traveling
>>>>>>several miles on this "path" my BN announced that we had arrived!
>>>>>>Where were we? No where! The camp was not anywhere around there.
>>>>>
>>>>>>With my hopes dashed, we turned around and made our way back to the
>>>>>>road more traveled. Eventually we found the right turn and I put a
>>>>>>user POI at the camp entrance.
>>>>>
>>>>>>My bad luck again. The actual camp entrance was 3.48 miles from the
>>>>>>GPS location. After this and previous experiences, I now am shy of
>>>>>>using my GPS to do any navigation for others.
>>>>>
>>>>>>Still eager to make GPS work for me, I took time to fire it up as I
>>>>>>was shown from the cabin to the main lodge. Confident that I had
>>>>>>learned well how to create a manual route, I set out. I put in a
>>>>>>series of way points along the trail. All seemed well.
>>>>>>However, after dinner and when it was dark, I found someone else who
>>>>>>was also staying in my cabin. She was not sure of the direction.
>>>>>>Again, I suggested that my GPS could help us in the dark. I started
>>>>>>it up and had to pair the receiver due to a spontaneous BN crash and
>>>>>>reset earlier in the afternoon.
>>>>>>Eventually I was successful in getting the BN and receiver to see each
>>>>>>other. Then there was a long wait for a fix. My friend remained
>>>>>>patient. Eventually there was success. Now, all I had to do was to
>>>>>>reverse the route. All I could get from it was that I could not
>>>>>>recalculate the route. It was only after I gave up and followed her
>>>>>>guesses that we made our way to the cabin.
>>>>>>There, I worked with it until I realized that I had probably exited
>>>>>>the main lodge at a door different from the one I had set as a way
>>>>>>point.
>>>>>>Both doors would have been on the same side of the building, but I
>>>>>>suspect that they were more than 30 feet apart.
>>>>>
>>>>>>One more try. When I was ready to come home, all I needed was to get
>>>>>>my luggage from the cabin. My driver had not been to the cabin and
>>>>>>there seemed to be no one to ask. Again, I tried my GPS. This time,
>>>>>>I knew it could help because I had a user POI.
>>>>>>It must have taken ten minutes to acquire a fix. Meanwhile, We got
>>>>>>into the car and he drove around trying to spot the cabin.
>>>>>>As we pulled up to it, my GPS announced that we had arrived. It was
>>>>>>too late to be of any benefit this time. He had seen the sign far
>>>>>>earlier than the GPS.
>>>>>
>>>>>>I am afraid my GPS is becoming a source of great humor. No one will
>>>>>>trust it. I am afraid that in my circumstances, I have little
>>>>>>confidence that it can be relied upon for much of anything.
>>>>>
>>>>>>I am grateful that Tele Atlas is looking at the major discrepancies in
>>>>>>my home town. However, the wilderness areas of Washington state also
>>>>>>seem to be questionable as my trips to two different camp sites in
>>>>>>very different parts of the state have both yielded errors of 3.5
>>>>>>miles.
>>>>>
>>>>>>Trying to be enthusiastic about my GPS.
>>>>>
>>>>>>Joleen
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>>
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