<div dir="ltr"><div><div><div><div><div>Mark<br><br></div>The problem you have is that you would have to create the GPS signal which is not the nmea string, that is created by the GPS engine itself. Rebroadcasting a GPS signal would be frowned upon by the FCC!!! <br><br></div>The other issue with a network based time system is you really never know how long the packet takes to get thru the network, the delay could kill you. NTP uses the time stamp to approximate the delay and tries to compensate for the delay.<br><br></div>If you can get a clean cat 5 from the outside to the instrument I would just remove the GPS from the aldus/ k2 and convert the serial data and the PPS signal to rs422 and send it down that way. If they have central network closets they may be able to patch you a dry cable. Greg may be able to help you with that.<br><br></div>As for fiber, if you are just running the nmea and pps signals Greg and I built some boards to use with the 4td's to run the GPS over multimode fiber. I have also used B&B's fiber optic modem to send GPS signals over fiber but either way the GPS would need to be removed from the unit unless it has an external GPS interface.<br><br></div>Bob <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 2, 2016 at 2:35 PM, Meremonte, Mark <span dir="ltr"><<a href="mailto:mmeremonte@usbr.gov" target="_blank">mmeremonte@usbr.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi All,<div><br></div><div>Have a K2-Altus where difficult to install GPS coax cable to a skyview location. However, nearby is a network connection where IRIG-B is available over the Ethernet. Anyone have knowledge of an IP device that could grab the IRIG-B signal, convert it to a standard RF GPS NMEA signal to input over coax to K2 in this instance?</div><div><br></div><div>Or, I wonder if a logger that supported IP and NTP was installed, could that IRIG-B be converted into a NTP signal for logger to utilize?</div><div><br></div><div>3rd option I entertained is use of an Fiber Optic Network System which has a pair of devices which provides a standard RF GPS NMEA coax signal to device. (very expensive system though).</div><div><br></div><div>Regards,</div><div>mark</div><span class="HOEnZb"><font color="#888888"><div><div><br></div>-- <br><div><div dir="ltr"><div><div dir="ltr"><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">******************************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">***************************</span><br style="color:rgb(136,136,136);font-family:'Times New Roman',Times"><span style="font-family:'Times New Roman',Times"><font color="#0000ff">Mark Meremonte</font><font color="#666666"> Geophysicist </font></span><br style="font-family:'Times New Roman',Times"><span style="color:rgb(102,102,102);font-family:'Times New Roman',Times">U.S. Bureau of Reclamation: </span><span style="font-family:tahoma,sans-serif;font-size:12.8px">Seismology, Geomorphology, and Geophysics Group</span><br><div><span style="font-family:'Times New Roman',Times"><font color="#666666"><span style="background-color:rgb(255,255,255)">Denver Federal Center</span> Work: <a href="tel:303-445-3298" value="+13034453298" target="_blank">303-445-3298</a> Cell: <a href="tel:303-808-3894" value="+13038083894" target="_blank">303-808-3894</a></font></span></div><div><font color="#666666"><span style="font-family:'Times New Roman',Times">POBox 25007, 85-833000</span><span style="font-family:'Times New Roman',Times"> Email: <a href="mailto:mmeremonte@usbr.gov" target="_blank">mmeremonte@usbr.gov</a></span><br style="font-family:'Times New Roman',Times"><span style="font-family:'Times New Roman',Times">Denver, CO 80225 </span><span style="font-family:'Times New Roman',Times"> </span><span style="font-family:'Times New Roman',Times"> Web: </span><font face="Times New Roman, Times"><a href="http://www.usbr.gov" target="_blank">http://www.usbr.gov</a></font></font></div><div><font color="#666666"><span style="font-family:'Times New Roman',Times">Ship: </span><span style="font-family:'Times New Roman',Times">U.S. Bureau of Reclamation, DFC, Bldg. 67-10th Floor, Denver, CO 80225</span></font></div><div><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">******************************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">**************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">**************</span></div></div></div></div></div>
</div></font></span></div>
<br>_______________________________________________<br>
ANSS-netops mailing list<br>
<a href="mailto:ANSS-netops@geohazards.usgs.gov">ANSS-netops@geohazards.usgs.gov</a><br>
<a href="https://geohazards.usgs.gov/mailman/listinfo/anss-netops" rel="noreferrer" target="_blank">https://geohazards.usgs.gov/mailman/listinfo/anss-netops</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Robert Wurth<br>AV Computer Tech<br>Department of Atmospheric and Earth Sciences<br>St Louis University<br>205 O'Neil Hall<br>3642 Lindell Blvd.<br>St. Louis, MO 63108, USA<br>Phone (314) 977-3137, 314-977-3135 <br> Fax (314) 977-3117 </div>
</div>