Many people watched live as North Korea's latest satellite was put into orbit, despite UN bans on the country's use of such technologies.
State media published images of Kim Jong-un at a reception with NATA employees, senior military and political officials, as well as his daughter and son wife, Ri Sol Ju.
The leader's family and other attendees at the reception wear T-shirts with the inscription NATA in English, in these images.
All participants applauded enthusiastically and expressed their thanks to Kim Jong-un, KCNA said.
After the launch, Seoul on Wednesday partially suspended a 2018 military agreement with North Korea to prevent armed incidents along the inter-Korean border and immediately deployed surveillance and reconnaissance assets to this border.
North Korea's Defense Ministry called Seoul's measures reckless and announced it was suspending also this agreement, in its entirety.
Experts say putting a working spy satellite into orbit would improve Pyongyang's intelligence capabilities and would provide crucial data in the event of military conflict.