Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 22.  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)
 03/23/2023   14:53:06   ( -70.14, 132.88) 03/23/2023   14:54:07  ( -70.16, 132.88)    2.27                61
 03/23/2023   15:43:49   (  70.03, -59.64) 03/23/2023   15:43:34  (  70.00, -59.69)    3.33                15
 03/23/2023   16:34:21   ( -69.41, 108.58) 03/23/2023   16:33:11  ( -69.50, 107.25)   52.96                70
 03/26/2023   07:09:57   ( -70.12,-111.32) 03/26/2023   07:10:32  ( -70.12,-111.28)    1.47                35
 03/26/2023   08:00:41   (  70.01,  56.16) 03/26/2023   07:59:59  (  70.02,  56.21)    2.22                42
 03/28/2023   22:36:13   (  70.52,-163.49) 03/28/2023   22:37:24  (  70.38,-162.65)   34.85                71
 03/28/2023   23:26:48   ( -70.06,   4.55) 03/28/2023   23:26:58  ( -70.05,   4.51)    1.88                10
 03/29/2023   00:17:32   (  69.95, 172.02) 03/29/2023   00:16:25  (  69.94, 172.00)    1.65                67
 03/31/2023   14:52:58   (  70.16, -47.14) 03/31/2023   14:53:52  (  70.16, -47.07)    2.45                54
 03/31/2023   15:43:40   ( -70.06, 120.33) 03/31/2023   15:43:22  ( -70.05, 120.41)    3.09                18
 03/31/2023   16:34:09   (  69.16, -71.05) 03/31/2023   16:33:02  (  69.22, -73.08)   80.49                67
 04/03/2023   07:09:49   (  70.12,  68.70) 04/03/2023   07:10:16  (  70.13,  68.77)    2.84                27
 04/03/2023   08:00:29   ( -69.97,-123.75) 04/03/2023   07:59:46  ( -69.96,-123.82)    2.62                43