Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 18.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 08/20/2021   08:07:41   ( -68.77,-123.83) 08/20/2021   08:08:15  ( -68.79,-123.77)    3.25                34
 08/20/2021   08:58:25   (  68.64,  43.66) 08/20/2021   08:57:43  (  68.63,  43.67)    1.55                42
 08/22/2021   23:33:59   (  69.03,-175.73) 08/22/2021   23:35:10  (  68.96,-175.31)   18.52                71
 08/23/2021   00:24:37   ( -68.74,  -8.01) 08/23/2021   00:24:42  ( -68.74,  -7.95)    2.43                 5
 08/23/2021   01:15:20   (  68.55, 159.54) 08/23/2021   01:14:10  (  68.57, 159.48)    3.12                70
 08/25/2021   15:50:51   (  68.79, -59.63) 08/25/2021   15:51:39  (  68.79, -59.64)    0.84                48
 08/25/2021   16:41:33   ( -68.70, 107.81) 08/25/2021   16:41:09  ( -68.69, 107.86)    2.64                24
 08/25/2021   17:31:59   (  67.60, -83.49) 08/25/2021   17:30:52  (  67.67, -85.69)   93.40                67
 08/28/2021   07:17:18   ( -69.67,-112.42) 08/28/2021   07:18:26  ( -69.57,-110.40)   78.82                68
 08/28/2021   08:07:47   (  68.76,  56.18) 08/28/2021   08:08:06  (  68.73,  56.16)    3.25                19
 08/28/2021   08:58:28   ( -68.61,-136.31) 08/28/2021   08:57:36  ( -68.63,-136.33)    1.84                52
 08/30/2021   23:33:58   ( -68.84,   4.52) 08/30/2021   23:35:04  ( -68.84,   4.53)    0.63                66
 08/31/2021   00:24:42   (  68.73, 171.99) 08/31/2021   00:24:31  (  68.72, 172.03)    2.06                11
 08/31/2021   01:15:18   ( -68.31, -20.15) 08/31/2021   01:14:06  ( -68.34, -20.80)   26.89                72