Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/16/2021   10:17:58   (  -0.01,-137.21) (  -0.79,-133.78)  391.18                80
 01/17/2021   22:39:55   (   0.01,-137.21) (  -0.41,-139.08)  213.36                80
 01/18/2021   22:23:50   (   0.01,-137.21) (   0.61,-134.55)  302.72                80
 01/20/2021   10:45:37   (  -0.01,-137.20) (   0.60,-139.82)  298.98                80
 01/21/2021   10:24:13   (  -0.01,-137.19) (  -0.42,-135.29)  216.66                80
 01/22/2021   22:46:09   (   0.01,-137.18) (  -0.77,-140.59)  389.09                80
 01/23/2021   22:30:05   (   0.02,-137.17) (   0.25,-136.06)  126.10                80
 01/25/2021   10:51:53   (  -0.02,-137.15) (   0.90,-141.34)  477.05                80
 01/26/2021   10:30:29   (  -0.02,-137.14) (  -0.12,-136.81)   37.61                80
 01/28/2021   22:33:39   (   0.03,-137.09) (  -0.10,-137.57)   55.56                80
 01/29/2021   22:17:35   (   0.03,-137.07) (   0.93,-133.05)  458.65                80