2023-10-20 04:33:00
How does Starlink work?
Communication satellites providing access to the internet have, to date, been geostationary and placed at high altitude (36,000 km). This altitude allows a single satellite to cover a large area. But this has two disadvantages: the need for large satellites and a relatively long transit time (600 ms) between the latter and the earth. To overcome these constraints, Starlink has opted for a satellite network placed in low orbit (around 550 km from Earth). Currently, it is made up of more than 3,000 satellites; in 2025 there will be more than 12,000 and, ultimately, for complete coverage, more than 30,000 are planned. To limit terrestrial processing stations, satellites communicate with each other via laser link. Then, the signals are picked up by the terminal using an antenna. Transit time is estimated between 20 ms and 35 ms. The satellites are put into orbit by the Falcon 9 launcher (developed by SpaceX). The reduced dimensions and weight allow a single launcher to put a string of several dozen satellites into orbit. One of the weak points of satellites in low orbit is the operating time (lifetime in orbit). To make it as good as possible, everything has been studied, from the propellant to the krypton to the solar panels. Taking into account all the elements (number of satellites, technology, low orbit, etc.), we can estimate an upward rate (upload) of 10 to 20 Mbits/sc, downward rate (download) between 50 and 150 Mbits/sc.
The price: two options, sea or land
The price of a complete installation (Starlink maritime) which consists of the antenna, its Wi-Fi router, all the cables and the connections is close to 3,000 euros. As for the monthly subscription, count on around 300 euros for a speed of 50 GB, sufficient for pleasure. If you want 1 TB, count 1,150 euros. It is possible to activate or deactivate the subscription when you are not using it. The rectangular antenna (50 x 30 cm) must be placed outdoors, not obscured by obstacles (mast, shrouds, boom, etc.) with a clear view of the sky. The whole thing must be powered by 230 volts. On board, you must provide a quality 12/230 volt sinusoidal converter, the overall consumption is close to 80 watts, which is far from negligible. Configuration is done via wifi from a smartphone and the application (iOS or Android). The Starlink system is evolving with the placing of new satellites into orbit. We have seen the Starlink Maritime solution, but you can go for the Starlink Roam model designed for motorhomes. This will cost around 450 euros for the motorized antenna (not marinized) and 100 euros/month for the subscription. If you remain stationary, you can take out the so-called residential subscription (fixed location) at 40 euros/month. At any time, you can pause or change your subscription. The prices of equipment that can be rented, and communications are given as an indication, they may change (+ or -). You should know that the residential kit is available in mass distribution. For the subscription, you can choose residential or mobile. If you stay in port a lot or if you sail less than 10 miles, you can opt for a maritime subscription (230 euros/month).
Our opinion
To date, Starlink is a solution that does not lack interest. The most difficult thing is to make the right choice from the different packages offered which are constantly evolving and to take into account the consumption which is significant since it is close to that of an inboard pilot (80 watts). The rental solution is an interesting possibility because it allows you to test the equipment and evaluate its usefulness. But be careful, this is a temporary solution that should be short-lived. Ultimately, it becomes close to the price of a complete kit. Currently, it is not part of the global maritime safety system because when transmitting, we cannot detect the position.
1697777308
#Highspeed #Internet #Starlink