Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2017   19:20:39   (  -0.01, -89.31) (   0.17, -88.57)   84.47                80
 11/25/2017   07:23:41   (  -0.01, -89.31) (   0.01, -89.30)    2.75                80
 11/27/2017   19:24:12   (   0.01, -89.34) (  -0.15, -90.09)   84.88                80
 11/28/2017   19:08:07   (   0.02, -89.35) (   0.84, -85.55)  432.47                80
 11/30/2017   07:29:54   (  -0.01, -89.35) (   0.33, -90.82)  167.40                80
 12/01/2017   07:08:30   (  -0.01, -89.36) (  -0.71, -86.29)  349.89                80
 12/02/2017   19:30:25   (   0.00, -89.38) (  -0.51, -91.59)  252.13                80
 12/03/2017   19:14:21   (   0.00, -89.39) (   0.53, -87.07)  265.31                80
 12/05/2017   07:36:08   (   0.01, -89.40) (   0.64, -92.34)  334.34                80