Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2023   22:18:07   (   0.01,-137.33) (   0.95,-133.04)  488.52                80
 01/09/2023   10:39:54   (  -0.01,-137.33) (   0.24,-138.31)  113.00                80
 01/10/2023   10:18:30   (  -0.01,-137.32) (  -0.80,-133.79)  402.73                80
 01/11/2023   22:40:26   (   0.01,-137.31) (  -0.37,-139.10)  203.22                80
 01/12/2023   22:24:20   (   0.01,-137.31) (   0.61,-134.56)  312.35                80
 01/14/2023   10:46:08   (  -0.01,-137.29) (   0.57,-139.83)  289.78                80
 01/15/2023   10:24:43   (  -0.01,-137.28) (  -0.47,-135.31)  225.23                80
 01/16/2023   22:46:39   (   0.01,-137.26) (  -0.75,-140.61)  382.28                80
 01/17/2023   22:30:34   (   0.02,-137.24) (   0.30,-136.09)  132.13                80
 01/19/2023   10:52:20   (  -0.02,-137.21) (   0.93,-141.35)  471.86                80
 01/20/2023   10:30:56   (  -0.02,-137.19) (  -0.12,-136.83)   41.87                80