Answer :
Final answer:
GPS's L1 frequency carries both the c/a code and the P code. So the answer is choice B.
Explanation:
The GPS system employs two frequencies, L1 and L2. L1 carries both the c/a code (Coarse/Acquisition) and the P code (Precision). Therefore, the correct answer to your question: 'GPS sends L1 and L2. What is on L1?' is B. c/a code and P code.
Learn more about GPS frequencies here:
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