Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 2.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2023   14:52:25   (  70.68, -47.86) 05/02/2023   14:53:35  (  70.57, -46.55)   49.67                70
 05/02/2023   15:42:57   ( -70.07, 120.42) 05/02/2023   15:43:12  ( -70.07, 120.36)    2.32                15
 05/02/2023   16:33:42   (  70.00, -72.16) 05/02/2023   16:32:39  (  69.97, -72.14)    3.22                63
 05/05/2023   07:09:12   (  70.15,  68.73) 05/05/2023   07:10:10  (  70.13,  68.68)    3.32                58
 05/05/2023   07:59:54   ( -70.07,-123.82) 05/05/2023   07:59:39  ( -70.07,-123.76)    2.14                15
 05/05/2023   08:50:26   (  69.31,  44.61) 05/05/2023   08:49:17  (  69.36,  42.91)   67.01                69
 05/07/2023   23:26:08   (  70.11,-175.44) 05/07/2023   23:26:37  (  70.10,-175.48)    1.76                29
 05/08/2023   00:16:50   ( -70.02,  -7.99) 05/08/2023   00:16:07  ( -69.99,  -8.00)    3.45                43
 05/10/2023   14:52:23   ( -70.34, 132.65) 05/10/2023   14:53:35  ( -70.27, 133.00)   15.90                72
 05/10/2023   15:43:03   (  70.07, -59.62) 05/10/2023   15:43:02  (  70.10, -59.59)    3.42                 1
 05/10/2023   16:33:45   ( -69.98, 107.83) 05/10/2023   16:32:32  ( -69.99, 107.89)    2.54                73
 05/13/2023   07:09:15   ( -70.15,-111.29) 05/13/2023   07:10:02  ( -70.13,-111.30)    2.16                47
 05/13/2023   07:59:59   (  70.04,  56.19) 05/13/2023   07:59:29  (  70.02,  56.18)    2.30                30
 05/15/2023   22:35:40   (  70.80,-163.88) 05/15/2023   22:36:49  (  70.68,-162.25)   61.36                69
 05/15/2023   23:26:10   ( -70.07,   4.59) 05/15/2023   23:26:28  ( -70.08,   4.52)    3.05                18
 05/16/2023   00:16:54   (  69.96, 172.07) 05/16/2023   00:15:55  (  69.96, 171.99)    2.89                59