Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2021   10:51:48   (  -0.04,-137.20) (   0.89,-141.33)  470.45                80
 03/15/2021   10:30:23   (  -0.04,-137.20) (  -0.15,-136.80)   45.63                80
 03/17/2021   22:33:34   (   0.04,-137.19) (  -0.03,-137.57)   43.28                80
 03/18/2021   22:17:29   (   0.04,-137.18) (   0.95,-133.03)  472.27                80
 03/20/2021   10:39:16   (  -0.04,-137.16) (   0.24,-138.30)  130.53                80
 03/21/2021   10:17:52   (  -0.04,-137.14) (  -0.80,-133.77)  384.47                80
 03/22/2021   22:39:47   (   0.03,-137.12) (  -0.42,-139.07)  221.83                80
 03/23/2021   22:23:42   (   0.02,-137.10) (   0.63,-134.54)  292.85                80
 03/25/2021   10:45:29   (  -0.02,-137.07) (   0.61,-139.79)  311.06                80
 03/26/2021   10:24:04   (  -0.01,-137.05) (  -0.43,-135.27)  203.17                80