Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 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)
 02/16/2021   10:39:23   (  -0.04,-137.22) (   0.23,-138.32)  126.43                80
 02/17/2021   10:17:58   (  -0.04,-137.21) (  -0.80,-133.80)  389.47                80
 02/18/2021   22:39:54   (   0.03,-137.20) (  -0.37,-139.10)  215.83                80
 02/19/2021   22:23:49   (   0.03,-137.19) (   0.60,-134.56)  299.73                80
 02/21/2021   10:45:37   (  -0.02,-137.18) (   0.55,-139.84)  302.64                80
 02/22/2021   10:24:12   (  -0.02,-137.16) (  -0.43,-135.30)  212.43                80
 02/23/2021   22:46:07   (  -0.00,-137.14) (  -0.80,-140.59)  394.14                80
 02/24/2021   22:30:03   (  -0.00,-137.12) (   0.23,-136.06)  120.47                80
 02/26/2021   10:51:50   (   0.01,-137.09) (   0.97,-141.33)  483.23                80
 02/27/2021   10:30:25   (   0.00,-137.07) (  -0.06,-136.80)   30.88                80
 03/01/2021   22:33:36   (  -0.00,-137.01) (  -0.13,-137.57)   63.34                80