Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 6 22.  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)
 06/22/2025   20:16:27   (   0.02, -99.61) (   0.00,-102.85)  361.14                 0
 06/23/2025   19:58:50   (   0.02, -99.07) (   0.23, -98.15)  104.81                80
 06/26/2025   07:59:09   (  -0.02, -97.69) (   0.24, -98.82)  129.33                80
 06/27/2025   07:43:02   (  -0.01, -97.15) (  -0.64, -94.26)  328.84                80
 06/28/2025   20:02:18   (   0.00, -96.35) (  -0.68, -99.54)  362.79                80
 06/29/2025   19:46:11   (  -0.00, -95.82) (   0.19, -94.98)   95.81                80
 07/02/2025   07:46:30   (   0.01, -94.46) (   0.26, -95.66)  136.09                80
 07/03/2025   07:30:23   (   0.01, -93.93) (  -0.62, -91.10)  322.78                80
 07/04/2025   19:49:38   (  -0.00, -93.14) (  -0.76, -96.37)  368.17                80
 07/05/2025   19:33:32   (  -0.00, -92.62) (   0.18, -91.82)   90.65                80