Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 29.  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)
 07/01/2023   15:17:36   ( -70.04, 126.71) 07/01/2023   15:18:31  ( -70.06, 126.66)    3.34                55
 07/01/2023   16:08:21   (  69.98, -65.89) 07/01/2023   16:07:58  (  69.96, -65.84)    2.80                23
 07/01/2023   16:58:48   ( -69.09, 102.71) 07/01/2023   16:57:40  ( -69.19, 100.75)   78.37                68
 07/04/2023   07:34:30   ( -70.05,-117.54) 07/04/2023   07:35:05  ( -70.03,-117.52)    2.78                35
 07/04/2023   08:25:14   (  69.94,  49.93) 07/04/2023   08:24:32  (  69.92,  49.98)    2.86                42
 07/06/2023   23:00:51   (  70.65,-170.02) 07/06/2023   23:02:00  (  70.57,-168.49)   56.95                69
 07/06/2023   23:51:23   ( -70.02,  -1.72) 07/06/2023   23:51:38  ( -70.03,  -1.65)    2.61                15
 07/07/2023   00:42:06   (  69.86, 165.83) 07/07/2023   00:41:06  (  69.87, 165.77)    2.33                60
 07/09/2023   15:17:32   (  70.05, -53.30) 07/09/2023   15:18:41  (  70.05, -53.38)    3.05                69
 07/09/2023   16:08:14   ( -69.94, 114.18) 07/09/2023   16:08:11  ( -69.95, 114.11)    2.54                 3
 07/09/2023   16:58:53   (  69.58, -77.97) 07/09/2023   16:57:41  (  69.67, -78.62)   27.38                72
 07/12/2023   07:34:25   (  70.03,  62.50) 07/12/2023   07:35:13  (  70.06,  62.51)    3.13                48
 07/12/2023   08:25:07   ( -69.92,-130.02) 07/12/2023   08:24:44  ( -69.91,-130.08)    3.02                23