(no subject)

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Hello, Cliff,
    Briefly, my project is using FPGA as the correlator instead of GP2021,
and the software is OSGPS. In my project, I find the difference between
tr_bit_time/meas_bit_time and epoch_20ms (read from hardware) is becoming
larger and larger as times goes on, even larger than 100! What cause this
problem? During debugging, I found that the program seldom successes when
execting the pream function in track state, although the DLL/PLL track loops
work very well!
  Another question about the astat variable in gpsisr() function. When will
this variable is valid? once per 1ms?
  Looking forward for you reply!
  Best regards,

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<div dir="ltr">Hello, Cliff,<br>&nbsp;&nbsp;&nbsp; Briefly, my project is using FPGA as the correlator instead of GP2021, and the software is OSGPS. In my project, I find the difference between
tr_bit_time/meas_bit_time and epoch_20ms (read from hardware) is becoming larger and larger as times goes on, even larger than 100! What cause this problem? During debugging, I found that the program seldom successes when execting the pream function in track state, although the DLL/PLL track loops work very well!<br>
&nbsp; Another question about the astat variable in gpsisr() function. When will this variable is valid? once per 1ms?<br>
&nbsp; Looking forward for you reply!<br>&nbsp; Best regards,</div>

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