Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 17.  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)
 12/18/2022   10:51:49   (   0.01,-137.34) (   0.85,-141.13)  432.04                80
 12/19/2022   10:28:10   (   0.01,-137.33) (  -0.30,-136.06)  145.90                80
 12/20/2022   22:46:45   (  -0.01,-137.32) (  -0.70,-140.55)  366.90                80
 12/21/2022   22:28:25   (  -0.01,-137.32) (   0.39,-135.47)  210.34                80
 12/23/2022   10:46:44   (   0.00,-137.30) (   0.56,-139.90)  295.31                80
 12/24/2022   10:23:04   (  -0.00,-137.29) (  -0.54,-134.82)  281.29                80
 12/25/2022   22:41:38   (   0.01,-137.26) (  -0.47,-139.30)  233.52                80
 12/26/2022   22:23:20   (   0.01,-137.25) (   0.69,-134.24)  343.01                80
 12/28/2022   10:38:57   (  -0.02,-137.23) (   0.28,-138.66)  162.93                80
 12/29/2022   10:20:38   (  -0.02,-137.21) (  -0.84,-133.58)  413.64                80
 12/30/2022   22:36:32   (   0.02,-137.18) (  -0.18,-138.07)  101.39                80