Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 7.  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)
 09/07/2023   08:37:16   (   0.00,-104.71) (   0.74,-108.01)  376.09                80
 09/08/2023   08:15:51   (   0.00,-104.71) (  -0.27,-103.48)  139.79                80
 09/09/2023   20:37:47   (  -0.01,-104.69) (  -0.95,-108.78)  467.11                80
 09/10/2023   20:21:44   (  -0.01,-104.69) (   0.11,-104.26)   49.27                80
 09/13/2023   08:24:47   (   0.02,-104.71) (   0.11,-104.99)   33.24                80
 09/14/2023   08:03:23   (   0.02,-104.71) (  -0.96,-100.48)  483.15                80
 09/15/2023   20:25:20   (  -0.02,-104.69) (  -0.25,-105.78)  123.37                80
 09/16/2023   20:09:15   (  -0.02,-104.70) (   0.76,-101.25)  393.23                80
 09/18/2023   08:31:03   (   0.02,-104.72) (   0.40,-106.52)  204.84                80
 09/19/2023   08:09:39   (   0.02,-104.72) (  -0.62,-102.00)  311.37                80
 09/20/2023   20:31:35   (  -0.02,-104.70) (  -0.58,-107.30)  296.00                80