Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/13/2019   22:17:18   (  -0.02,-128.34) (  -0.96,-132.64)  488.95                80
 03/14/2019   21:55:52   (  -0.02,-128.34) (   0.04,-128.10)   27.26                80
 03/17/2019   10:00:44   (   0.03,-128.37) (   0.10,-128.84)   52.53                30
 03/18/2019   09:40:09   (   0.03,-128.36) (  -0.90,-124.30)  463.41                80
 03/19/2019   22:04:44   (  -0.03,-128.30) (  -0.30,-129.60)  147.08                80
 03/20/2019   21:43:18   (  -0.03,-128.29) (   0.70,-125.06)  368.57                80
 03/22/2019   10:07:45   (   0.03,-128.33) (   0.49,-130.32)  227.77                80
 03/23/2019   09:46:19   (   0.03,-128.32) (  -0.51,-125.79)  287.81                80
 03/24/2019   22:10:55   (  -0.03,-128.25) (  -0.68,-131.08)  323.07                80
 03/25/2019   21:49:29   (  -0.03,-128.24) (   0.32,-126.55)  192.13                80