Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 11 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/05/2018   22:15:14   (  -0.13,-129.42) (  -0.85,-132.69)  372.53                80
 11/06/2018   21:59:07   (  -0.14,-128.59) (  -0.01,-128.12)   53.86                80
 11/07/2018   21:40:18   (  -0.16,-127.76) (   0.77,-123.54)  480.08                80
 11/09/2018   09:59:22   (   0.13,-126.34) (   0.67,-128.76)  274.95                80
 11/10/2018   09:43:14   (   0.14,-125.52) (  -0.17,-124.19)  151.74                80
 11/12/2018   21:43:39   (  -0.11,-123.57) (  -0.43,-124.87)  148.97                80
 11/13/2018   21:27:32   (  -0.12,-122.73) (   0.41,-120.30)  276.64                80
 11/15/2018   09:46:35   (   0.09,-121.29) (   1.03,-125.52)  481.79                80
 11/16/2018   09:27:47   (   0.10,-120.46) (   0.19,-120.95)   55.36                80
 11/17/2018   09:11:39   (   0.11,-119.63) (  -0.60,-116.37)  370.85                80