Main responsibilities of the Satellite Research Institute (SRI) include: Research and Development, applied and experimental projects in the field of space science and technology as well as design and manufacturing of communications and remote sensing satellite. Some of the projects in the field of satellites which are undertaken at SRI are as follows:
▖ Nahid-1 Project:
The flight model of Nahid-1 was shown on 14th February 2016 in the National Space Technology Day in presence of President Hassan Rouhani.
Nahid-1 missions are defined as the first step for in house development of geostationary communications satellite for the first time and its results can be used as the basic technology needed for operational satellites.
Nahid-1, as a micro-satellite, was assumed to test deployment of solar panels in orbit, Communication in Ku-band, taking pictures of the deployment process and estimating the opening rate.
Three-axis attitude control, satellite positioning, and effective S-band communication can be figured out as the secondary objectives of this project.
Nahid 1 Satellite
▖ Nahid-2 Project:
Nahid-2 is a communications microsatellite in LEO to develop some other critical subsystems of GEO communications satellites as the second step in these satellites’ roadmap. This satellite is cubic and generates its required power using the body mounted solar arrays. Nahid-2 satellite will control its attitude in three-axis with a precision better than 3 degrees (RMS). Nahid 2 satellite communicates with ground stations in VHF, UHF, S and Ku bands.
▖ Soha Project:
Soha Satellite project is for design, development and operation of a remote sensing satellite in orbit with application approach. Soha satellite is going to take images in 7 spectral bands and with a ground resolution of 15 meters. Sending images to the ground station, Soha project will provide a priceless collection of remote sensing data for various fields such as monitoring lands, forests, water and mines.
Soha CAD Model
▖ Satellite Simulation General Software (SIL Project)
The project aims to validate the operation of satellites in various orbits of the spacecraft from the moment of launch till the end of the mission. Subsystems and system-level elements are also included. All of the satellite system’s elements and its operational environment have been simulated based on technical issues. The integrated simulator has been ready in form of an aggregated set up to investigate the performance of each subsystem independently, and also in interaction with other subsystems and facing errors, disturbances and unknown scenarios.
▖ Development and Improvement of Space Related Technologies:
In addition to the afore-mentioned projects and products, SRI has covered different research activities on satellites and related sciences, which some of them are listed as below:
○ Space LIDAR Payload Design:
LIDAR Payload includes a laser, a telescope and a detector. The most important use of this Payload is in the study of atmospheric parameters, Aerosol monitoring and Atmospheric correction of satellite images.
○ Fuzzy Array Antenna:
In order to reduce the power consumption of remote sensing satellites ¬in real-time data transmission, using a phased array antenna as the satellite antenna has been proposed. This project covers design and simulation of¬ a Phased Array Antenna.
○ Satellite Thermal Environment Simulation:
Satellite Thermal Environment Simulator presents space thermal conditions of a satellite in orbit and investigates the operation of thermal control subsystem in these environmental conditions.
○ MPFL Thermal Control System:
This project reviews the use of thermal control systems based on circulation of pumped fluids to accelerate and increase heat transfer in satellites.
Laboratories and R&D Equipment:
SRI has laboratories for telecommunications, electronics and electrical, and also attitude determination and control. There is also a “hardware in the loop (HIL)” lab and an integration area for micro to small satellites.
SRI has a clean room in small size for micro to small satellites with an area of 22.5 m2 and a height of 2.4 meters, in the class of 100000 in accordance with the E 209 standard.