In accordance with the appointment, in every system there are two basic frequencies – L1 (Standard definition) and L2 (high precision). For navstar L1 = 1575,42 MHz and L2 = 1227,6 MHz. In glohass uses frequency separation of signals, ie, each satellite operates at its own frequency and, accordingly, L1 is in the range from 1602.56 to 1615.5 MHz and L2 from 1246.43 to 1256.53. Signal in the L1 is available to all users, the signal in the L2 – only the military (ie, can not be decrypted without the express private key). Each satellite system, in addition to basic information, reports and supporting, necessary for continuous operation receiving equipment. This category includes a complete anthology of all the satellite constellation, the transmitted sequence in a few minutes.
Thus, the start of the reception device can be fast enough if it contains the actual almanac (about 1 minute) – this is called "warm start", but may take up to 15 minutes, if the receiver has to receive a full almanac – Sc. "Cold Start. The need for a "cold start" usually occurs when you first turn on the receiver, or if he has not been used. On the differences between systems, said on 22/6/2007 Internet briefing the press service of the Federal Space Agency Director General – Designer General, Research and Production Association of Applied Mechanics (NPO pm, , Krasnoyarsk Territory) Nicholas Testoedov. Nicholas Testoedov: 'Comparison of systems that designed around the same time – in 80 years of the last century shows that they are close to destination, output characteristics, the potential accuracy of the location, structure, logic operation and management.
Among Mobile Marketing is generally used advertising through wireless telecommunications and portable wireless devices with the aim of persons by means of direct transmission of information on a specific behavior to keep up. SMS advertising is a special measure in the field of mobile marketing to inform customers and prospective customers via the medium of SMS on products and services of a particular company. Sounds interesting? The correct way to use it to come: a company, a customer list, an SMS provider Dispatch: type text, send, done. An SMS message with efficiency? Hardly. Like any marketing activity should also be prepared according to SMS marketing. * Collect mobile numbers: deposit them on its website a script with which to register customers and prospects for information transmission via SMS can.
Or do they offer their customers free SMS: Every new customer who signs up for the Free SMS Tool agrees to receive occasional information from them via SMS. Customer details * note: Deposit them in their SMS Dispatch program information to their customers, for customers to event organizers, for example, information such as rock or hip hop. These can be summarized easily using this information to a group and as targeted send. Alternative criteria for group creation include gender, age, or zip code. * Targeted campaigns: The event organizer is now a rock night Friday, Saturday an event for young people 15-18 years. He now sends all its customers both SMS, this action does not only money but also guests who are not interested in these events can be annoyed and unsubscribe with the time of its news service. Send campaigns target group takes over next to the cost savings as well as the customer, because only satisfied contacts remain long-standing contacts. Send them their event info by means of the information field Rock and age restriction 15-18 years, so they meet exactly their target audience. More Tips and tricks for sending SMS in mobile marketing, they can always read about in the forum of SMSCreator to see / forum.