L1C signal

[Nistorescu Sorin]

The United States and Europe originally developed L1C as a common civil signal for GPS and Galileo. It is the 4th GPS signal for the civilian use.
According to the LS/T1M datasheet (January 21 2020), signal tracked for GPS constellation are:
"GPS C/A, P1, P2, L2C (L+M), L5 (I+Q)"

From T3 datasheet (November 26 2019) we can see:
"GPS C/A, L1C(P+D), P1, P2, L2C(L+M), L5(I+Q)"

But at "OEM Boards Comparison" ( https://www.javad.com/jgnss/products/oem/compare.html ), all boards seems to have the "L1C (P+D)" feature.
Which one is correct or am I wrong?

L1C codes are 10 times longer than L1 C/A, making it a robust GPS signal, very important for civilians to track and use it. Will become a standard for every GNSS unit in the near future.

 

[Zove]

T1-G3T was made 2008 show me SVN74/PRN04 L1C, see attachments. Maybe someone can help me to create plot like this https://www.maanmittauslaitos.fi/en/topical_issues/4th-gps-civilian-signal-goes-live from my log's? Thx and good luck!

 

[Zove]

 

[Nistorescu Sorin]

Thanks. I'm a little bit confused because of the LS/T1M datasheet.

Try RTKLIB. Possible Justin/Justin Link. Note that longer L1C codes generally mean improved performance but also requires an increase in receiver's clock speed, additional correlators and more processing power. If I'm not mistaken, processor frequency for T1-G3T is 240 Mhz.

 

[Javad]

We do track L1C and we do have processing power to deal with it. Yes, it is a better signal. I did not understand the concern.

 

[Nistorescu Sorin]

It is only a LS/T1M datasheet concern. I do not see L1C(P+D).

 

[Javad]

You are absolutely correct. We need to update the data sheet.