Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/09/2019   21:49:40   (  -0.00,-128.36) (   0.37,-126.60)  200.05                80
 03/11/2019   10:14:08   (   0.00,-128.40) (   0.77,-131.87)  395.09                80
 03/12/2019   09:52:42   (   0.00,-128.40) (  -0.22,-127.34)  121.15                80
 03/13/2019   22:17:18   (  -0.01,-128.35) (  -0.98,-132.63)  488.98                80
 03/14/2019   21:55:52   (  -0.00,-128.34) (   0.02,-128.10)   26.81                80
 03/17/2019   09:58:54   (   0.01,-128.35) (   0.12,-128.83)   54.75                80
 03/18/2019   09:42:48   (   0.00,-128.34) (  -0.88,-124.30)  460.52                80
 03/19/2019   22:04:44   (  -0.01,-128.27) (  -0.32,-129.59)  150.71                80
 03/20/2019   21:43:18   (  -0.00,-128.26) (   0.68,-125.06)  364.35                80
 03/22/2019   10:05:06   (   0.01,-128.28) (   0.46,-130.33)  233.15                80
 03/23/2019   09:49:00   (   0.00,-128.27) (  -0.55,-125.80)  281.86                80