| Telemetry or "remote measurement" is a highly | | | | radiosonde, a instrument that automatically measured |
| automated communications process by which | | | | atmospheric temperature, pressure and humidity by |
| measurements are made and other data collected at | | | | means of a small, expendable telemetry transmitter |
| remote, inaccessible or dangerous places, and then | | | | from a balloon high in space, and relayed the data |
| relayed by a telemetry transmitter to receiving | | | | back to Earth using radio signals. These days, |
| stations for display, monitoring, and recording. The | | | | telemetry is used in testing of moving vehicles such |
| original telemetry systems were termed | | | | as cars, aircrafts, missiles and satellites. National |
| "supervisory" because they were used to monitor | | | | Aeronautics and Space Administration (NASA), |
| electric power distribution. Communication channels | | | | European Space Agency (ESA) and other international |
| form a major part of any telemetry system, as it | | | | space agencies use telemetry transmitters for data |
| involves measurement of the transmission of data | | | | collection and transmission from orbiting spacecrafts |
| over various mediums. | | | | and satellites. |
| Telemetry transmitter is the instrument used for | | | | Wireless networking without the encumbrance and |
| recording the readings of an instrument and | | | | restriction of wires connecting the transmitter and |
| transmitting them by radio or wireless frequencies. | | | | receiver has catapulted the potential applications of |
| Technically, when relaying data, it is necessary for | | | | telemetry. Major applications of telemetry includes |
| the transmitter to identify the data item | | | | automatic monitoring of large, complex systems such |
| corresponding to each segment of the bit stream. | | | | as satellites, chemical plants, oilrigs, electric power |
| This is done by inserting a synchronization bit string | | | | plants, gathering meteorological data, remote meter |
| into the telemetry stream on a regular basis, usually | | | | reading, logistics management, tracking endangered |
| at the beginning or end of each repeating cycle. This | | | | land and marine species, real time physiological |
| generally corresponds to the beginning or end of a | | | | monitoring of patients, and monitoring manned and |
| minor or major frame of telemetry data. | | | | unmanned space flights. |
| Aerospace telemetry initiated in the 1930s with the | | | | |
