I am trying to receive a GPS signal and I am using RTL-SDR2832U, and an
antenna with 40dB gain.

According to my research, the signal coming from the satellite is at RF,
and it gets downconverted in front-end to IF (Intermediate Frequency).

Now, I need to remove that IF from the signal coming from the front end by
multiplying it with the local generated carrier signal. For this, I want to
know the exact value of the IF. But, I am confused that how can I get this?
I also tried reading the data sheet of RTL-SDR but couldn't find the
helpful information.

Is there anyway to find the exact IF frequency?

Thank you
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