Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 23.  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)
 03/26/2023   07:09:57   ( -70.12,-111.32) 03/26/2023   07:10:32  ( -70.12,-111.29)    1.50                35
 03/26/2023   08:00:41   (  70.01,  56.16) 03/26/2023   07:59:59  (  70.01,  56.21)    2.09                42
 03/28/2023   22:36:13   (  70.53,-163.50) 03/28/2023   22:37:23  (  70.42,-162.59)   36.23                70
 03/28/2023   23:26:48   ( -70.07,   4.53) 03/28/2023   23:26:57  ( -70.09,   4.57)    2.39                 9
 03/29/2023   00:17:32   (  69.96, 172.01) 03/29/2023   00:16:24  (  69.98, 172.06)    2.75                68
 03/31/2023   14:52:57   (  70.13, -47.10) 03/31/2023   14:53:52  (  70.13, -47.11)    0.67                55
 03/31/2023   15:43:39   ( -70.04, 120.37) 03/31/2023   15:43:22  ( -70.02, 120.37)    1.51                17
 03/31/2023   16:34:09   (  69.19, -71.09) 03/31/2023   16:33:01  (  69.25, -73.04)   77.56                68
 04/03/2023   07:09:47   (  70.11,  68.71) 04/03/2023   07:10:14  (  70.13,  68.79)    3.48                27
 04/03/2023   08:00:28   ( -69.96,-123.74) 04/03/2023   07:59:45  ( -69.97,-123.81)    2.73                43
 04/05/2023   22:35:57   ( -70.37,  16.79) 04/05/2023   22:37:09  ( -70.27,  17.23)   19.99                72
 04/05/2023   23:26:37   (  70.06,-175.42) 04/05/2023   23:26:38  (  70.04,-175.45)    2.41                 1
 04/06/2023   00:17:19   ( -69.96,  -7.95) 04/06/2023   00:16:08  ( -69.93,  -7.96)    2.79                71