Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 31.  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)
 12/31/2022   22:46:41   (  -0.02,-136.92) (  -0.81,-140.56)  414.31                80
 01/01/2023   22:30:35   (  -0.02,-136.92) (   0.16,-136.02)  101.57                80
 01/03/2023   10:52:24   (   0.02,-136.93) (   0.98,-141.30)  498.81                80
 01/04/2023   10:30:59   (   0.02,-136.92) (  -0.05,-136.78)   16.76                80
 01/06/2023   22:34:10   (  -0.02,-136.88) (  -0.16,-137.55)   76.84                80
 01/07/2023   22:18:05   (  -0.01,-136.86) (   0.87,-133.03)  438.03                80
 01/09/2023   10:39:53   (   0.01,-136.86) (   0.32,-138.30)  163.51                80
 01/10/2023   10:18:27   (   0.01,-136.84) (  -0.66,-133.76)  350.97                80
 01/11/2023   22:40:24   (  -0.00,-136.80) (  -0.51,-139.07)  258.30                80
 01/12/2023   22:24:19   (   0.00,-136.79) (   0.53,-134.55)  256.10                80
 01/14/2023   10:46:06   (   0.00,-136.78) (   0.66,-139.82)  345.96                80