Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 9.  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)
 09/09/2023   20:37:49   (   0.01,-104.69) (  -0.89,-108.79)  467.54                80
 09/10/2023   20:21:44   (   0.01,-104.69) (   0.12,-104.26)   48.80                80
 09/13/2023   08:24:48   (  -0.00,-104.71) (   0.04,-105.01)   33.74                80
 09/14/2023   08:03:24   (  -0.00,-104.71) (  -0.97,-100.48)  482.65                80
 09/15/2023   20:25:20   (  -0.00,-104.69) (  -0.24,-105.78)  123.88                80
 09/16/2023   20:09:15   (  -0.00,-104.70) (   0.78,-101.25)  392.72                80
 09/18/2023   08:31:04   (   0.00,-104.72) (   0.38,-106.53)  205.48                80
 09/19/2023   08:09:38   (  -0.00,-104.72) (  -0.58,-101.99)  310.73                80
 09/20/2023   20:31:35   (   0.00,-104.69) (  -0.56,-107.30)  296.75                80
 09/21/2023   20:15:30   (   0.00,-104.69) (   0.40,-102.76)  219.43                80