Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 6 15.  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)
 06/16/2025   20:27:34   (   0.00,-102.86) (  -0.68,-105.86)  342.52                80
 06/17/2025   20:11:28   (   0.00,-102.31) (   0.25,-101.31)  114.64                80
 06/20/2025   08:11:47   (  -0.00,-100.93) (   0.23,-101.98)  120.46                80
 06/21/2025   07:55:40   (  -0.00,-100.38) (  -0.64, -97.42)  336.70                80
 06/22/2025   20:14:56   (  -0.00, -99.56) (  -0.68,-102.70)  357.42                80
 06/23/2025   19:58:49   (  -0.00, -99.02) (   0.20, -98.14)   99.55                80
 06/26/2025   07:59:08   (   0.00, -97.62) (   0.26, -98.82)  136.09                80
 06/27/2025   07:43:02   (  -0.00, -97.08) (  -0.62, -94.26)  321.08                80
 06/28/2025   20:02:16   (   0.01, -96.27) (  -0.75, -99.53)  372.51                80
 06/29/2025   19:46:11   (   0.01, -95.73) (   0.19, -94.98)   85.14                80