Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 18.  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)
 03/18/2023   07:10:06   (  70.12,  68.66) 03/18/2023   07:10:40  (  70.11,  68.70)    1.41                34
 03/18/2023   08:00:47   ( -69.98,-123.81) 03/18/2023   08:00:10  ( -70.00,-123.84)    2.12                37
 03/20/2023   22:36:23   ( -70.66,  16.27) 03/20/2023   22:37:33  ( -70.58,  17.61)   50.27                70
 03/20/2023   23:26:58   (  70.08,-175.50) 03/20/2023   23:27:07  (  70.09,-175.45)    2.03                 9
 03/21/2023   00:17:40   ( -69.99,  -8.05) 03/21/2023   00:16:37  ( -69.97,  -7.98)    3.03                63
 03/23/2023   14:53:06   ( -70.16, 132.84) 03/23/2023   14:54:07  ( -70.14, 132.85)    3.11                61
 03/23/2023   15:43:50   (  70.05, -59.69) 03/23/2023   15:43:34  (  70.03, -59.66)    3.23                16
 03/23/2023   16:34:22   ( -69.43, 108.55) 03/23/2023   16:33:12  ( -69.48, 107.22)   52.08                70
 03/26/2023   07:09:57   ( -70.09,-111.28) 03/26/2023   07:10:33  ( -70.09,-111.32)    1.54                36
 03/26/2023   08:00:41   (  69.99,  56.19) 03/26/2023   08:00:00  (  69.98,  56.17)    1.11                41
 03/28/2023   22:36:13   (  70.50,-163.46) 03/28/2023   22:37:24  (  70.40,-162.62)   33.31                71
 03/28/2023   23:26:48   ( -70.09,   4.51) 03/28/2023   23:26:57  ( -70.07,   4.54)    2.56                 9
 03/29/2023   00:17:31   (  69.93, 172.05) 03/29/2023   00:16:24  (  69.95, 172.02)    2.47                67
 03/31/2023   14:52:57   (  70.15, -47.12) 03/31/2023   14:53:51  (  70.17, -47.06)    3.07                54
 03/31/2023   15:43:39   ( -70.05, 120.35) 03/31/2023   15:43:21  ( -70.06, 120.42)    3.23                18
 03/31/2023   16:34:09   (  69.20, -71.11) 03/31/2023   16:33:01  (  69.22, -73.07)   77.45                68