Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 12.  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)
 06/12/2025   13:38:15   (  71.13, -29.83) 06/12/2025   13:39:21  (  71.03, -27.15)   97.57                66
 06/12/2025   14:28:39   ( -70.13, 139.11) 06/12/2025   14:29:05  ( -70.15, 139.16)    3.22                26
 06/12/2025   15:19:23   (  69.97, -53.35) 06/12/2025   15:18:33  (  70.00, -53.41)    3.25                50
 06/15/2025   05:54:56   (  70.29,  87.29) 06/15/2025   05:56:07  (  70.25,  87.55)   10.74                71
 06/15/2025   06:45:35   ( -70.08,-105.05) 06/15/2025   06:45:38  ( -70.08,-105.06)    0.62                 3
 06/15/2025   07:36:19   (  69.93,  62.48) 06/15/2025   07:35:06  (  69.92,  62.37)    4.46                73
 06/17/2025   22:11:50   (  70.14,-156.71) 06/17/2025   22:12:40  (  70.16,-156.70)    1.88                50
 06/17/2025   23:02:31   ( -70.03,  10.78) 06/17/2025   23:02:10  ( -70.05,  10.78)    2.72                21
 06/17/2025   23:52:59   (  69.03, 179.54) 06/17/2025   23:51:53  (  69.06, 177.08)   97.71                66
 06/20/2025   14:28:46   (  70.10, -40.89) 06/20/2025   14:29:12  (  70.11, -40.90)    1.07                26
 06/20/2025   15:19:27   ( -69.98, 126.61) 06/20/2025   15:18:42  ( -70.01, 126.59)    2.86                45
 06/23/2025   05:55:01   ( -70.41, -92.91) 06/23/2025   05:56:13  ( -70.33, -92.36)   23.07                72
 06/23/2025   06:45:41   (  70.07,  74.93) 06/23/2025   06:45:43  (  70.05,  74.89)    2.54                 2
 06/23/2025   07:36:22   ( -69.94,-117.56) 06/23/2025   07:35:13  ( -69.95,-117.62)    2.14                69
 06/25/2025   22:11:53   ( -70.17,  23.23) 06/25/2025   22:12:47  ( -70.14,  23.26)    3.06                54
 06/25/2025   23:02:37   (  70.04,-169.26) 06/25/2025   23:02:14  (  70.03,-169.26)    1.15                23