[OpenSource_GPS] About pull_in state Parameter

[??]

Dear Sir:
 
 I'm a graduate student. I'm very interested in OSGPS. I wanna know the detail about OSGPS.

In the end of pull_in state, the software use    if (c->avg > 14 * rms / 10  && c->th_rms < 12000  && c->ms_set) as the condition for track state.

My problem :
1   avg > 14 * rms / 10  ,what's the meaning  of 14 and 10
2    c->th_rms < 12000   why should we choose 12000 as the the threshold

Looking forward for your reply!
Best Regard!


----- Original Message ----- 
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To: <opensource_gps at lists.psas.pdx.edu>
Sent: Friday, May 09, 2008 3:00 AM
Subject: opensource_gps Digest, Vol 49, Issue 2


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>   2. Re: Why add 0.5 in pull_in and track parameter (??)
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> Message: 1
> Date: Wed, 7 May 2008 12:00:42 -0700
> From: <shuaihan at live.com>
> Subject: [OpenSource_GPS] ????
> To: opensource_gps at lists.psas.pdx.edu
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> Message: 2
> Date: Thu, 8 May 2008 09:55:09 +0800
> From: "??" <jiangyigirl at yahoo.com.cn>
> Subject: Re: [OpenSource_GPS] Why add 0.5 in pull_in and track
> parameter
> To: <opensource_gps at lists.psas.pdx.edu>
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> Dear Sir:
> 
> I found Open Source software is :
> 
> pull_carr_C1=(int) (1.69852*Bnpullcarr/Carrier_DCO_Delta/(4.0+5.333*Bnpullcarr/1000.0+(1.8856*Bnpullcarr/1000.0)*
>  (1.8856*Bnpullcarr/1000.0))+0.5);
> 
> pull_carr_C2=(int) (0.6369183/Carrier_DCO_Delta*(1.8856*Bnpullcarr/1000.0)*(1.8856*Bnpullcarr/1000.0)*1000.0/
>  (4.0+5.333*Bnpullcarr/1000.0+(1.8856*Bnpullcarr/1000.0)*(1.8856*Bnpullcarr/1000.0))+0.5);
> 
> pull_code_C1=(int) (10.598/Code_DCO_Delta*Bnpullcode/(4.0+5.333*Bnpullcode/1000.0+(1.8856*Bnpullcode/1000.0)*
>  (1.8856*Bnpullcode/1000.0))+0.5);
> 
> pull_code_C2=(int) (4.028/Code_DCO_Delta*(1.8856*Bnpullcode/1000.0)*(1.8856*Bnpullcode/1000.0)*1000.0/
>  (4.0+5.333*Bnpullcode/1000.0+(1.8856*Bnpullcode/1000.0)*(1.8856*Bnpullcode/1000.0))+0.5);
> 
> I know C1 C2  is 
> pull_carr_C1 = 1/(Ko*Kn)*8*zeta*On*Ts/(4+4*zeta*On*Ts+(On*Ts)^2);    
> pull_carr_C2 = 1/(Ko*Kn)*4*(On*Ts)^2/(4+4*zeta*On*Ts+(On*Ts)^2); 
> 
> By compared, I wonder why add 0.5 to C1 and C2
> 
> 
> ----- Original Message ----- 
> From: <opensource_gps-request at lists.psas.pdx.edu>
> To: <opensource_gps at lists.psas.pdx.edu>
> Sent: Thursday, May 08, 2008 3:00 AM
> Subject: opensource_gps Digest, Vol 49, Issue 1
> 
> 
>> Send opensource_gps mailing list submissions to
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>> or, via email, send a message with subject or body 'help' to
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>> Today's Topics:
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>>   1. osgps run under windows xp (yuguangzhan)
>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Wed, 7 May 2008 12:05:10 +0000 (UTC)
>> From: yuguangzhan <yuguang.zhan at 163.com>
>> Subject: [OpenSource_GPS] osgps run under windows xp
>> To: opensource_gps at lists.psas.pdx.edu
>> Message-ID: <loom.20080507T120323-538 at post.gmane.org>
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>> 
>> Hi, Cliff:
>> 
>> 
>> I purchased a GPS1005  PCI bus board on year 2007 from GPS Creations. Now we 
>> want to run it under windows xp.So we wonder if  the opensource_gps code can 
>> run in windows xp and if there is a windows WDM driver available. 
>> 
>> Could you please advise how could I proceed in order to find
>> such driver? Do you know anyone else who could have it available?
>> 
>> Sincerely,
>> 
>> yuguang.
>> 
>> 
>> 
>> 
>> 
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