Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/29/2019   10:18:02   (   0.02,-137.20) (  -0.76,-133.75)  393.15                80
 12/30/2019   22:42:37   (  -0.03,-137.20) (  -0.43,-139.05)  211.51                80
 12/31/2019   22:21:12   (  -0.02,-137.19) (   0.58,-134.52)  304.91                80
 01/02/2020   10:45:38   (   0.03,-137.20) (   0.62,-139.78)  294.97                80
 01/03/2020   10:24:12   (   0.02,-137.19) (  -0.39,-135.25)  221.18                80
 01/04/2020   22:48:48   (  -0.03,-137.18) (  -0.79,-140.55)  384.26                80
 01/05/2020   22:27:22   (  -0.03,-137.17) (   0.22,-136.01)  131.49                80
 01/07/2020   10:51:48   (   0.04,-137.16) (   0.98,-141.27)  469.64                80
 01/08/2020   10:30:23   (   0.04,-137.14) (  -0.03,-136.74)   45.60                80
 01/10/2020   22:36:13   (  -0.04,-137.10) (  -0.14,-137.51)   46.93                80
 01/11/2020   22:14:47   (  -0.04,-137.08) (   0.87,-132.97)  467.45                80