Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 19.  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)
 02/20/2023   23:01:47   ( -70.13,  10.80) 02/20/2023   23:02:52  ( -70.14,  10.81)    0.94                65
 02/20/2023   23:52:31   (  70.01, 178.28) 02/20/2023   23:52:19  (  70.03, 178.31)    2.37                12
 02/21/2023   00:43:06   ( -69.55, -13.72) 02/21/2023   00:41:55  ( -69.59, -14.68)   37.45                71
 02/23/2023   15:18:41   ( -70.05, 126.68) 02/23/2023   15:19:18  ( -70.07, 126.60)    3.41                37
 02/23/2023   16:09:25   (  69.94, -65.84) 02/23/2023   16:08:45  (  69.96, -65.91)    3.30                40
 02/26/2023   06:44:58   (  70.40,  74.59) 02/26/2023   06:46:09  (  70.29,  75.18)   25.47                71
 02/26/2023   07:35:35   ( -70.04,-117.54) 02/26/2023   07:35:41  ( -70.07,-117.50)    3.09                 6
 02/26/2023   08:26:19   (  69.93,  49.94) 02/26/2023   08:25:08  (  69.95,  49.98)    3.11                71
 02/28/2023   23:01:47   (  70.09,-169.16) 02/28/2023   23:02:36  (  70.08,-169.22)    2.38                49
 02/28/2023   23:52:29   ( -69.99,  -1.69) 02/28/2023   23:52:06  ( -69.97,  -1.74)    2.62                23
 03/03/2023   14:28:12   ( -70.94, 137.94) 03/03/2023   14:29:19  ( -70.88, 140.22)   83.36                67
 03/03/2023   15:18:41   (  70.05, -53.34) 03/03/2023   15:18:59  (  70.05, -53.35)    0.60                18
 03/03/2023   16:09:23   ( -69.95, 114.13) 03/03/2023   16:08:29  ( -69.95, 114.13)    0.38                54