Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/01/2021   10:51:30   (  -0.02,-137.19) (   0.90,-141.24)  461.43                80
 05/02/2021   10:30:06   (  -0.03,-137.19) (  -0.13,-136.71)   54.13                80
 05/04/2021   22:33:20   (   0.02,-137.18) (  -0.06,-137.49)   35.35                80
 05/05/2021   22:17:17   (   0.02,-137.18) (   0.97,-132.97)  480.23                80
 05/07/2021   10:39:05   (  -0.01,-137.17) (   0.24,-138.23)  121.95                80
 05/08/2021   10:17:41   (  -0.02,-137.16) (  -0.79,-133.71)  393.31                80
 05/09/2021   22:39:39   (   0.01,-137.15) (  -0.42,-139.01)  212.53                80
 05/10/2021   22:23:35   (   0.01,-137.14) (   0.61,-134.49)  302.51                80
 05/12/2021   10:45:24   (  -0.01,-137.12) (   0.60,-139.75)  300.65                80
 05/13/2021   10:24:00   (  -0.01,-137.10) (  -0.43,-135.23)  213.78                80
 05/14/2021   22:45:57   (   0.01,-137.08) (  -0.77,-140.53)  393.70                80