Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/02/2021   22:33:29   (   0.04,-137.20) (  -0.00,-137.55)   39.30                80
 04/03/2021   22:17:24   (   0.04,-137.19) (   0.98,-133.01)  476.58                80
 04/05/2021   10:39:10   (  -0.04,-137.17) (   0.24,-138.27)  125.87                80
 04/06/2021   10:17:46   (  -0.03,-137.16) (  -0.81,-133.75)  389.64                80
 04/07/2021   22:39:41   (   0.03,-137.15) (  -0.41,-139.04)  215.36                80
 04/08/2021   22:23:37   (   0.02,-137.14) (   0.64,-134.51)  300.15                80
 04/10/2021   10:45:23   (  -0.02,-137.12) (   0.57,-139.77)  302.49                80
 04/11/2021   10:23:57   (  -0.02,-137.10) (  -0.42,-135.23)  212.66                80
 04/12/2021   22:45:54   (   0.02,-137.09) (  -0.74,-140.54)  393.30                80
 04/13/2021   22:29:48   (   0.02,-137.07) (   0.25,-136.00)  121.57                80
 04/15/2021   10:51:35   (  -0.02,-137.04) (   0.90,-141.27)  482.06                80