Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2019   09:42:49   (   0.00,-128.00) (  -0.82,-124.28)  423.84                80
 12/16/2019   22:02:04   (   0.02,-127.92) (  -0.38,-129.58)  189.42                80
 12/17/2019   21:45:59   (   0.01,-127.89) (   0.62,-125.04)  323.56                80
 12/19/2019   10:05:06   (  -0.03,-127.86) (   0.52,-130.32)  280.40                80
 12/20/2019   09:49:00   (  -0.02,-127.82) (  -0.49,-125.78)  232.34                80
 12/21/2019   22:08:16   (   0.04,-127.73) (  -0.71,-131.08)  381.50                80
 12/22/2019   21:52:10   (   0.03,-127.69) (   0.30,-126.55)  131.09                80
 12/24/2019   10:11:17   (  -0.04,-127.66) (   0.90,-131.81)  473.39                80
 12/25/2019   09:55:11   (  -0.03,-127.61) (  -0.10,-127.27)   38.79                80
 12/27/2019   21:55:41   (   0.03,-127.47) (  -0.08,-128.04)   63.95                80