Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2018   22:40:08   (   0.04,-134.95) (  -0.89,-139.00)  462.57                80
 01/26/2018   22:24:04   (   0.04,-134.99) (   0.17,-134.48)   58.08                80
 01/29/2018   10:27:06   (  -0.03,-135.11) (  -0.03,-135.22)   12.49                80
 01/31/2018   22:30:16   (   0.03,-135.14) (  -0.15,-135.98)   95.92                80
 02/01/2018   22:08:50   (   0.03,-135.17) (   0.86,-131.45)  423.89                80
 02/03/2018   10:33:17   (  -0.02,-135.25) (   0.29,-136.72)  167.37                80
 02/04/2018   10:11:52   (  -0.02,-135.28) (  -0.72,-132.19)  352.19                80
 02/05/2018   22:36:27   (   0.02,-135.28) (  -0.45,-137.49)  251.73                80
 02/06/2018   22:15:02   (   0.02,-135.30) (   0.55,-132.95)  267.63                80