(Yield) Maps - StellarSupport - John Deere

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Glossary
Precision Farming. Managing one or more crop production inputs - fertilizer, limestone, herbicide, insecticide, seed, etc. -
on a site-specific basis to reduce waste, increase profits, and maintain the quality of the environment.
Preferences. User-controlled program settings that make JDFarm Office run as the user prefers.
Pressure Sensor. A device that produces an electrical signal proportional to a fluid pressure.
Primary Nutrients. Plant foods that are required in large quantities and are more critical to plant growth then secondary
nutrients or micronutrients. Primary nutrients include nitrogen, phosphorus, and potassium.
PseudoRandom Noise (PRN). Binary sequences of code that have noise-like properties. PRN codes allow all GPS
satellites to use a single frequency for the transmission of data at low power levels.
Pseudorange. An estimation of the true distance (range) from a GPS receiver to a satellite. The estimate contains some
error due to atmospheric propagation delays and the offset between the receiver’s clock and the satellite clock.
R
RADAR (Radio Detection And Ranging). A method of determining the position or velocity of an object by bouncing highfrequency
signals off the object and measuring the reflected signal.
Radio Data Broadcast System. Same as RDS.
Radio Data System. World-wide standard for transmitting digital data along with typical voice or music on a radio frequency.
In order to receive the RDS data, the radio receiver must have the RDS capability.
Radiometric Correction. Correction to reduce remotely sensed image distortion from variations in radiation levels at the
time of sensing.
Radiometric System. A yield monitoring system that consists of a radioactive source and a sensor. The mass flow rate of
a crop through a harvester is determined by the degree to which the crop obstructs the flow of radioactive particles from the
source to the sensor.
Random Access Memory (RAM). A measurement of the amount of information a computer can store and work with at one
time.
Raster Format. Format for storing GIS spatial data in which the data is stored in cells that are addressed by the row and
column of the cell.
Real-Time Correction. Correction of a GPS signal by immediately sending the differential correction information to the
mobile receiver on-the-go.
Real-Time Kinematic (RTK). Procedure whereby carrier-phase corrections are transmitted in real time from a reference
receiver to the user’s receiver.
Rectification. The process of correcting remote sensing image data to eliminate the effects of sensor orientation and
distortion present at the time of measurement.
Rectified. A remotely sensed image that has been geometrically corrected to eliminate the effects of sensor orientation and
distortion present at the time of measurement.
Relief Displacement. Differences in elevation that cause objects to appear to be positioned differently when viewed from
an angle instead of from overhead.
Remote Sensing. The act of detection and/or identification of an object, series of objects, or landscape without having the
sensor in direct contact with the object.
Repeat Cycle. The time it takes for a remote sensing satellite to view the entire Earth.
Root Mean Square (RMS). A statistical measure of the scatter of normally distributed data points about their mean. Also
known as “one sigma,” it is approximately equivalent to one standard deviation.
RTCM (Radio Technical Commission for Maritime Services). Subcommittee 104 of the RTCM developed standard
message formats for GPS signals.
S
Satellite Imaging. Processes involved in the formation of an image collected by a satellite-based remote sensing device.
Satellite Ranging. A method for determining position by measuring distances from several different satellites.
Satellite Solution. Differential correction signal transmitted from a geo-stationary satellite with a range of thousands of
miles. One of three common types of differential correction.
Scanners. 1) Sensors used to collect remotely sensed data in parallel paths. 2) A piece of computer equipment used for
converting information from paper to a digital format that can be read by a computer.