[gps-talkusers] Holux and number of satellites
- From: "Kevin Chao" <g.unit89@xxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Mon, 15 Oct 2007 20:55:42 -0700
Mary,
It is interesting because I just fired up a unit that has the Holux
GPSlim236 and it reported 11 satellite for most of the trip and there were
even a few times when I hhad 12 satellites. I don't ever recall having 12
satellites on the 236 for the year or so I used it and quite rareley did I
ever get 11 satellites. I think the last time I used the 236 was in April
and then on average I had between 7-10 satellites. But the funny thing was,
the entire evening I never received WAAS.
So when you think you have this satellite business down, it hits you in the
back.
Kevin
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Mary Ellen Earls
Sent: Monday, October 15, 2007 5:53 PM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
Interestingly I get 11 satellites quite frequently here where I am living
now. I have the Holux 236.
----- Original Message -----
From: "Kevin Chao" <g.unit89@xxxxxxxxxxxxx>
To: <gps-talkusers@xxxxxxxxxxxxx>
Sent: Monday, October 15, 2007 3:04 PM
Subject: [gps-talkusers] Re: e: My Latest Experience with GPS
> 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
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
>
Other related posts:
