Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 19.  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)
 03/19/2023   10:45:38   (  -0.00,-137.00) (   0.63,-139.87)  326.96                80
 03/20/2023   10:24:12   (  -0.00,-136.99) (  -0.38,-135.34)  189.26                80
 03/21/2023   22:46:07   (   0.00,-136.99) (  -0.84,-140.63)  415.79                80
 03/22/2023   22:30:01   (   0.00,-136.98) (   0.18,-136.10)  100.37                80
 03/25/2023   10:33:02   (  -0.00,-136.96) (  -0.04,-136.83)   14.88                80
 03/27/2023   22:33:31   (   0.01,-136.93) (  -0.14,-137.60)   76.07                80
 03/28/2023   22:17:25   (   0.01,-136.92) (   0.89,-133.07)  439.05                80
 03/30/2023   10:36:31   (  -0.02,-136.90) (   0.33,-138.33)  163.69                80
 03/31/2023   10:20:25   (  -0.02,-136.88) (  -0.71,-133.80)  351.20                80
 04/01/2023   22:39:39   (   0.03,-136.85) (  -0.47,-139.10)  256.03                80