Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 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)
 08/19/2023   22:15:58   (  -0.01,-137.01) (   0.91,-132.92)  466.36                80
 08/21/2023   10:37:46   (   0.02,-137.01) (   0.30,-138.18)  134.96                80
 08/22/2023   10:16:22   (   0.02,-137.00) (  -0.74,-133.66)  380.55                80
 08/23/2023   22:38:20   (  -0.02,-136.99) (  -0.43,-138.98)  226.01                80
 08/24/2023   22:22:15   (  -0.02,-136.98) (   0.56,-134.44)  288.94                80
 08/26/2023   10:44:03   (   0.03,-136.96) (   0.64,-139.71)  314.04                80
 08/27/2023   10:22:39   (   0.03,-136.94) (  -0.35,-135.18)  200.31                80
 08/28/2023   22:44:36   (  -0.04,-136.91) (  -0.81,-140.49)  407.85                80
 08/29/2023   22:28:32   (  -0.04,-136.89) (   0.19,-135.96)  106.31                80
 08/31/2023   10:50:20   (   0.04,-136.87) (   0.99,-141.24)  497.47                80
 09/01/2023   10:28:56   (   0.04,-136.85) (  -0.01,-136.71)   16.61                80