Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 13.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 08/15/2025   14:28:58   ( -70.09, 139.08) 08/15/2025   14:29:39  ( -70.09, 139.06)    0.71                41
 08/15/2025   15:19:42   (  70.00, -53.48) 08/15/2025   15:19:06  (  69.99, -53.44)    2.36                36
 08/18/2025   05:55:22   (  70.79,  86.42) 08/18/2025   05:56:30  (  70.70,  88.21)   66.41                68
 08/18/2025   06:45:52   ( -70.04,-105.07) 08/18/2025   06:46:10  ( -70.05,-105.12)    2.21                18
 08/18/2025   07:36:36   (  69.95,  62.37) 08/18/2025   07:35:37  (  69.94,  62.38)    1.41                59
 08/20/2025   22:12:04   (  70.12,-156.73) 08/20/2025   22:13:10  (  70.15,-156.73)    3.63                66
 08/20/2025   23:02:47   ( -70.04,  10.69) 08/20/2025   23:02:40  ( -70.04,  10.75)    2.23                 7
 08/20/2025   23:53:24   (  69.59, 178.68) 08/20/2025   23:52:12  (  69.66, 177.86)   32.33                72
 08/23/2025   14:28:57   (  70.08, -40.90) 08/23/2025   14:29:40  (  70.07, -40.96)    2.63                43
 08/23/2025   15:19:40   ( -70.00, 126.53) 08/23/2025   15:19:09  ( -70.02, 126.60)    3.19                31
 08/26/2025   05:55:23   ( -70.95, -93.84) 08/26/2025   05:56:30  ( -70.84, -91.57)   83.54                67
 08/26/2025   06:45:51   (  70.04,  74.93) 08/26/2025   06:46:10  (  70.02,  74.86)    3.35                19
 08/26/2025   07:36:34   ( -69.97,-117.64) 08/26/2025   07:35:39  ( -69.97,-117.58)    2.74                55