Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 12 6.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/08/2021   13:52:46   ( -70.36, 148.68) 12/08/2021   13:51:34  ( -70.42, 148.15)   20.86                72
 12/08/2021   14:42:16   (  70.09, -44.07) 12/08/2021   14:42:14  (  70.08, -44.03)    1.53                 2
 12/08/2021   15:31:46   ( -69.98, 123.41) 12/08/2021   15:32:56  ( -70.00, 123.41)    2.95                70
 12/11/2021   06:09:18   ( -70.18, -95.69) 12/11/2021   06:08:22  ( -70.20, -95.73)    1.92                56
 12/11/2021   06:58:45   (  70.07,  71.80) 12/11/2021   06:59:06  (  70.08,  71.76)    1.20                21
 12/11/2021   07:48:27   ( -69.31,-121.62) 12/11/2021   07:49:35  ( -69.31,-119.79)   71.94                68
 12/13/2021   22:25:47   ( -70.16,  20.16) 12/13/2021   22:25:13  ( -70.13,  20.14)    3.25                34
 12/13/2021   23:15:15   (  70.00,-172.43) 12/13/2021   23:15:57  (  70.02,-172.37)    3.42                42
 12/16/2021   13:52:41   (  70.51, -31.08) 12/16/2021   13:51:30  (  70.59, -32.10)   38.68                71
 12/16/2021   14:42:16   ( -70.14, 136.00) 12/16/2021   14:42:05  ( -70.13, 135.93)    2.83                11
 12/16/2021   15:31:43   (  70.02, -56.52) 12/16/2021   15:32:49  (  70.02, -56.59)    2.80                66
 12/19/2021   06:09:15   (  70.15,  84.27) 12/19/2021   06:08:13  (  70.17,  84.34)    3.45                62
 12/19/2021   06:58:45   ( -70.05,-108.24) 12/19/2021   06:58:55  ( -70.08,-108.21)    3.36                10
 12/19/2021   07:48:21   (  69.43,  58.56) 12/19/2021   07:49:29  (  69.43,  60.05)   58.32                68