Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 7.  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)
 03/08/2023   23:01:44   ( -70.09,  10.82) 03/08/2023   23:02:41  ( -70.09,  10.76)    2.39                57
 03/08/2023   23:52:28   (  69.98, 178.30) 03/08/2023   23:52:08  (  69.98, 178.25)    1.92                20
 03/09/2023   00:42:57   ( -69.20, -13.25) 03/09/2023   00:41:49  ( -69.27, -15.09)   72.90                68
 03/11/2023   15:18:37   ( -70.05, 126.66) 03/11/2023   15:19:06  ( -70.07, 126.62)    2.60                29
 03/11/2023   16:09:21   (  69.94, -65.87) 03/11/2023   16:08:33  (  69.96, -65.89)    2.39                48
 03/14/2023   06:44:48   (  70.17,  74.92) 03/14/2023   06:45:59  (  70.15,  75.00)    3.63                71
 03/14/2023   07:35:29   ( -70.02,-117.53) 03/14/2023   07:35:29  ( -70.04,-117.52)    2.36                 0
 03/14/2023   08:26:10   (  69.76,  50.18) 03/14/2023   08:24:58  (  69.82,  49.81)   15.61                72
 03/16/2023   23:01:40   (  70.11,-169.21) 03/16/2023   23:02:22  (  70.12,-169.14)    2.88                42
 03/16/2023   23:52:21   ( -69.96,  -1.66) 03/16/2023   23:51:53  ( -69.96,  -1.74)    2.78                28
 03/19/2023   14:28:00   ( -70.80, 138.16) 03/19/2023   14:29:08  ( -70.70, 139.96)   67.02                68
 03/19/2023   15:18:31   (  70.02, -53.29) 03/19/2023   15:18:45  (  70.03, -53.36)    3.03                14
 03/19/2023   16:09:13   ( -69.92, 114.18) 03/19/2023   16:08:15  ( -69.92, 114.12)    2.31                58