Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 8.  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)
 03/08/2023   20:10:47   (  -0.03,-104.71) (   0.70,-101.34)  384.12                80
 03/10/2023   08:32:35   (   0.03,-104.72) (   0.46,-106.61)  215.64                80
 03/11/2023   08:11:09   (   0.03,-104.73) (  -0.54,-102.08)  301.98                80
 03/12/2023   20:33:06   (  -0.03,-104.76) (  -0.60,-107.39)  299.30                80
 03/13/2023   20:17:00   (  -0.03,-104.77) (   0.41,-102.86)  218.36                80
 03/15/2023   08:38:46   (   0.04,-104.77) (   0.79,-108.12)  381.61                80
 03/16/2023   08:17:21   (   0.04,-104.78) (  -0.22,-103.59)  135.61                80
 03/17/2023   20:39:16   (  -0.05,-104.80) (  -0.95,-108.89)  466.40                80
 03/18/2023   20:23:11   (  -0.05,-104.81) (   0.07,-104.36)   51.26                80
 03/21/2023   08:26:12   (   0.05,-104.83) (   0.09,-105.10)   30.31                80