# GPS - What's the frequency Kenneth?

**URL:** <https://discourse.myriadrf.org/t/gps-whats-the-frequency-kenneth/1601>\
**Category:** LimeSDR\
**Created:** [16 August 2017 00:13 UTC](https://discourse.myriadrf.org/t/gps-whats-the-frequency-kenneth/1601 "2017-08-16T00:13:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [16 August 2017 00:13 UTC](https://discourse.myriadrf.org/t/gps-whats-the-frequency-kenneth/1601/1 "2017-08-16T00:13:54Z")

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After some marginal success with spoofing gps signals last spring, I tried again but not having any luck. Sat down tonight to really dig in, and on searching for what the spectrum should look like, noticed the project I was following had the freq off by 30Mhz ( [https://sdrgps.blogspot.com/2016/12/gps-fake-out-with-limesdr.html](https://sdrgps.blogspot.com/2016/12/gps-fake-out-with-limesdr.html) ) in the grc code. After making the correction to 1575.42MHz (plus scaling down to +/- 1 and watching in a wxgui fft sink) it works like gangbusters now! It was really marginal previously.

Anyway, now I can sit by the LimeSDR and play Pokemon Go without all that silly walking around. Tomorrow, Central Park. { Niantic might get suspicious if I just disappear here and show up there instantaneously! }.

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**Author:** ![KBBF5](https://avatars.discourse-cdn.com/v4/letter/k/edb3f5/32.png) [@KBBF5](https://discourse.myriadrf.org/u/KBBF5)\
**Post date:** [16 August 2017 03:12 UTC](https://discourse.myriadrf.org/t/gps-whats-the-frequency-kenneth/1601/2 "2017-08-16T03:12:26Z")

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Niantic will lock you out and possibly ban if you make moves like that.

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**Author:** ![gerryk](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/gerryk/32/138_2.png) [@gerryk](https://discourse.myriadrf.org/u/gerryk)\
**Post date:** [16 August 2017 09:11 UTC](https://discourse.myriadrf.org/t/gps-whats-the-frequency-kenneth/1601/3 "2017-08-16T09:11:33Z")

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I guess he was kidding.  
What i’d be interested in is whether it is possible to just spoof time-signals? In other words send correct positional information, but rewind time by a few minutes. It would be very interesting to try to break TOTP based 2FA using this ethod.