A. Sensors
B. Passive sensors
C. Active sensors
D. None of these
Correct Answer: Active sensors ✔
Last Updated: January 21, 2019
Related MCQs
- Orbital radius of GPS satellites is approximately __________?
- “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as__________?
- Who coined the term, ‘Remote sensing__________?
- A passive sensor uses __________?
- The basic requirement of any sensor system is__________?
- The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target__________?
- Spatial variation in horizontal and vertical directions is caused due to__________?
- If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by__________?
- The most widely used antenna in GPS is__________?
- Which one of the following attributes is not associated with digital maps__________?
- In GPS, receivers used are__________?
- For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is__________?
- Which on speed C. of the electromagnetic wave is correct ?
- Which one of the following frequency regions is a part of sun’s radiation ?
- Which one of the following geometric errors of satellite sensors is random ?
- The value of energy quantum for radiation of any frequency is proportional to__________?
- The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is__________?
- Pick up the important characteristic of a target which facilitates its identification from the following ?
- Earth observations from a satellite platform provide__________?
- DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within__________?
- Electromagnetic radiation__________?
- A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?
- Consider the following statements regarding the satellite imaging__________?
- The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________?
- Which one of the following residual biases involves the GPS accuracy ?
- Critical angle of electromagnetic radiation takes place if__________?
- Leaf reflectance depends primarily on__________?
- Which one of the following errors is produced by platform characteristics of the sensor ?
- If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height__________?
- Pick up the correct statement from the following__________?
- The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called__________?
- Pick up the correct statement from the following ?
- Geodimeter is based on__________?
- While propagating through homogeneous, isotropic media__________?
- The code based GPS receivers are generally used for__________?
- The normal altitude of GPS satellite is about__________?
- The various stages occuring in GPS system are described below ?
- Pick up the correct definition from the following with response to GIS__________?
- According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)__________?
- Electromagnetic spectrum contains__________?
- Which one of the following quantities forms the basis of radiometry ?
- For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is__________?
- The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared__________?
- Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its__________?
- The changes in the reflectivity/emissivity with time, is called ?
- Which one of the following helps to identify the objects on the earth surface ?
- The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called__________?
- Which one of the following statement is incorrect regarding the electromagnetic radiation ?
- A reduction of nitrogen nutrient in plants__________?
- Which one of the following statements is correct regarding the GPS satellites ?
- The optical property of a water body depends on ?