September 20th, 2017
D-Sat successfully completed of the orbital segment of the mission; it completed an eleven-week flight plan, during which D-Sat performed multiple iterations of SatAlert and DeCas experiments.
SatAlert, designed in collaboration between D-Orbit and the National Inter-University Consortium for Telecommunications (CNIT), University of Florence Research Unit, is an in-orbit validation of the Multiple Alert Message Encapsulation (MAMES) protocol, defined by ETSI (European Telecommunications Standards Institute). The experiment proved the viability of the encapsulation process, the transmission of MAMES over the space segment, and the reception and decoding by a portable Software Defined Radio User Terminal (SDR-UT). All the system components performed as expected, validating the whole alert messaging chain from the alert generation to the MAMES reception, including D-Sat’s onboard processing and broadcasting capability, the SDR-UT reception, and the web-based machine-to-machine communication mechanisms for data exchange. To validate the main features of MAMES, ground station operators generated and uploaded different types of MAMES messages. The success of the SatAlert Experiment is the first step towards a wider implementation and adoption of the MAMES protocol.
DeCAS (Debris Collision Alerting System), developed by Aviosonic Space Tech, is a patented system able to determine the dynamics of the debris footprint area associated to the re-entry of the hosting satellite. Upon re-entry of the hosting spacecraft, DeCAS survives the break-up phase and broadcasts the debris footprint dynamics forecast to civil protection agencies. In a real-world scenario, this information would be processed on ground and then transmitted in real-time to airplanes flying over that zone through the Air Traffic Control Center, and to the populated areas below through national public safety agencies.
To validate the system, D-Sat’s ground operators have submitted 83 messages simulating uncontrolled re-entry. DeCAS was able to process in real-time more than 98% of these messages, which were afterwards sent to CNIT for the encapsulation into MAMES protocol messages and for the consecutive upload. Ten of these alerts have successfully completed the entire process, simulating a DeCAS satellite broadcast service. Thanks to a collaboration with Ponti Institute and ARI of Gallarate, where Aviosonic had installed its ground station, all DeCAS messages have been received, along with more than 14 hours of D-Sat broadcasts, validating the whole system architecture.
July 16th, 2017
So far, D-Sat has traveled more than 12 million km.
The satellite is performing two of the three independent experiments we have carried on board (SatAlert and DeCas experiment).
July 1st, 2017
The team is keeping its health in check through different LEOP (Launch and Early Operations Phase) tests and they will soon start testing the GPS and calibrating its sensors.
The team also was recently able to determine D-Sat's NORAD catalog number, which means that now Radio Hams as well will be able to acquire its signal.
June 29th, 2017
D-Sat completed its 100th orbits!
june 25th, 2017
Today the team was able to establish a link for 9 full minutes and download everything they needed to study D-Sat's behavior along the orbit. Here's a waterfall chart showing the intensity of the signal against frequency and time.
june 23rd, 2017
During the first window of visibility, a few hours after launch, the team was already able to acquire the signal and receive the first telemetry. D-Sat is doing great... and it's quite chatty!
- First Hello from Space
june 23rd, 2017 - Successful launch
The mission was successfully launched from Satish Dhawan Space Centre in India atop a PSLV rocket.
Below, you can watch the feed of the launch!