Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2023   10:39:26   (   0.03,-136.97) (   0.36,-138.35)  157.73                80
 03/15/2023   10:18:01   (   0.03,-136.96) (  -0.65,-133.82)  357.35                80
 03/16/2023   22:39:56   (  -0.04,-136.93) (  -0.53,-139.12)  249.85                80
 03/17/2023   22:23:50   (  -0.04,-136.91) (   0.49,-134.59)  264.92                80
 03/19/2023   10:45:37   (   0.04,-136.89) (   0.70,-139.85)  338.02                80
 03/20/2023   10:24:11   (   0.04,-136.87) (  -0.32,-135.32)  176.60                80
 03/21/2023   22:46:06   (  -0.04,-136.84) (  -0.89,-140.62)  431.07                80
 03/22/2023   22:30:00   (  -0.04,-136.82) (   0.13,-136.09)   83.47                80
 03/25/2023   10:33:00   (   0.04,-136.76) (   0.06,-136.81)    5.74                80