Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 14.  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)
 03/15/2023   08:38:46   (   0.02,-104.74) (   0.79,-108.12)  385.22                80
 03/16/2023   08:17:21   (   0.02,-104.75) (  -0.22,-103.59)  131.52                80
 03/17/2023   20:39:16   (  -0.02,-104.76) (  -0.96,-108.89)  470.86                80
 03/18/2023   20:23:11   (  -0.02,-104.77) (   0.06,-104.36)   46.24                80
 03/21/2023   08:26:11   (   0.02,-104.77) (   0.10,-105.09)   37.39                80
 03/22/2023   08:04:46   (   0.01,-104.77) (  -0.93,-100.56)  479.85                80
 03/23/2023   20:26:40   (  -0.02,-104.80) (  -0.28,-105.86)  121.70                80
 03/24/2023   20:10:35   (  -0.02,-104.81) (   0.75,-101.33)  396.01                80
 03/26/2023   08:32:21   (   0.02,-104.81) (   0.41,-106.60)  204.00                80
 03/27/2023   08:10:55   (   0.02,-104.81) (  -0.56,-102.06)  313.28                80