[time-nuts] GPS PRN vs SV...??

[Bruce Griffiths]

Magnus Danielson wrote:
>
> Then you haven't found the Ephemeris Report Packet 0x58 type 6 where Byte 4 is
> the SV number. The text is fuzzy, but if you consider that Byte 2 in the
> common header to all 0x58 replies contains the PRN number, it is more likely to
> be a documentation miss than anything. 
>
> It would be a simple matter to verify this by simply requesting this message
> for all PRNs and then check byte 4.
>
> Cheers,
> Magnus
>
>   
Hej Magnus

Although it is labelled as SV number, my version of the documentation
clearly states that the meaning of byte 4 is the SV PRN#.

However as you say since the PRN# is given in the common 4 byte header
this would seem somewhat redundant.

The documentation is certainly inconsistent and confusing.

I guess the operational test is:
Does the displayed SV number contain values greater than 32 (current
values for SVN can be as high as 61, the maximum value for PRN is 32)?
If so then its very likely to be the SVN and not the PRN.

Bruce