The National Observatory – ON, a research institute linked to the Ministry of Science, Technology and Innovation – MCTI, operates in three major areas of knowledge: Astronomy, Geophysics and Metrology in Time and Frequency, in which it conducts research, technological development and innovation, with national recognition and international projection. Its activities include the training of researchers in its postgraduate courses, the qualification of professionals, the coordination of projects and national activities in its areas of activity and the generation, maintenance and dissemination of Brazilian Legal Time.

The Observatório Nacional (ON), through the national contract between CAPES and IEEE has an unlimited open access agreement with IEEE that enables researchers to publish articles as open access without open access fees in all IEEE fully and hybrid open access journals. The agreement applies to all original research articles accepted for publication between 5 November 2024 – 30 October 2027. To benefit from this agreement, the corresponding author has to be affiliated with Observatório Nacional (ON). Please use the correct institution name and your institutional email address during submi​​ssion. It is recommended for authors to select the CC BY 4.0 license. The open access funding request will be approved by an OA administrator at CAPES. Overlength page charges or color fees are not covered by the agreement and will be charged to authors.