institutions and universities, has been able to design and successfully put the satellites of omid rased navid tadbir fajr noor ik noor do into orbit. also, the design and construction stages of other satellites such as nahid 1, nahid 21 and tolo 3 have been completed and they have been launched into space . the moon and tolo 3 have unique characteristics compared to the previous models . and the heaviest satellite ever built the country is an intermediate step to transfer the orbit, especially this tom satellite is located at a height of 500 km from the earth's surface, and there is a front of this satellite, which is a hot gas engine that transfers the orbit from 500 km to 550 km. the design and construction of satellites has been considered to empower the private sector, which in total has developed more than a hundred knowledge-based companies in this direction , and in fact, achieving the ability and knowledge to design and manufacture remote sensing satellites has become localized in the country , and this process is progressing. abbas rasouli of sed and sima news agency , in your opinion, which model is be