Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 9.  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)
 02/10/2023   07:35:34   ( -70.10,-117.57) 02/10/2023   07:36:00  ( -70.10,-117.51)    2.16                26
 02/10/2023   08:26:18   (  69.98,  49.91) 02/10/2023   08:25:27  (  70.00,  49.99)    3.43                51
 02/12/2023   23:01:46   (  70.29,-169.41) 02/12/2023   23:02:58  (  70.22,-169.09)   14.17                72
 02/12/2023   23:52:25   ( -70.04,  -1.71) 02/12/2023   23:52:29  ( -70.05,  -1.70)    0.89                 4
 02/13/2023   00:43:09   (  69.93, 165.77) 02/13/2023   00:41:56  (  69.95, 165.80)    2.04                73
 02/15/2023   15:18:34   (  70.09, -53.33) 02/15/2023   15:19:27  (  70.12, -53.35)    3.09                53
 02/15/2023   16:09:16   ( -70.00, 114.13) 02/15/2023   16:08:57  ( -70.01, 114.13)    0.86                19
 02/15/2023   16:59:45   (  69.09, -77.25) 02/15/2023   16:58:38  (  69.13, -79.42)   86.15                67
 02/18/2023   07:35:24   (  70.07,  62.49) 02/18/2023   07:35:53  (  70.09,  62.49)    1.80                29
 02/18/2023   08:26:06   ( -69.98,-130.05) 02/18/2023   08:25:23  ( -69.98,-130.03)    1.10                43
 02/20/2023   23:01:37   ( -70.48,  10.32) 02/20/2023   23:02:48  ( -70.40,  11.19)   33.71                71
 02/20/2023   23:52:15   (  70.07, 178.28) 02/20/2023   23:52:19  (  70.07, 178.35)    2.83                 4
 02/21/2023   00:42:56   ( -69.92, -14.18) 02/21/2023   00:41:50  ( -69.91, -14.24)    2.65                66