Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 9 12.  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)
 09/13/2025   19:20:52   (   0.23, -89.52) (   0.42, -88.68)   95.67                80
 09/16/2025   07:21:14   (  -0.23, -89.48) (  -0.23, -89.41)    7.33                80
 09/18/2025   19:24:24   (   0.24, -89.53) (   0.07, -90.18)   74.75                80
 09/19/2025   19:08:19   (   0.24, -89.54) (   1.12, -85.65)  442.80                80
 09/21/2025   07:30:06   (  -0.24, -89.51) (   0.06, -90.92)  160.14                80
 09/22/2025   07:08:41   (  -0.24, -89.52) (  -0.95, -86.38)  357.43                80
 09/23/2025   19:30:36   (   0.24, -89.57) (  -0.21, -91.69)  240.25                80
 09/24/2025   19:14:31   (   0.24, -89.59) (   0.79, -87.15)  277.79                80
 09/26/2025   07:36:18   (  -0.23, -89.57) (   0.39, -92.42)  324.06                80