Question: Orbital radius of GPS satellites is approximately ___________________?

• 1. 15,200 km
• 2. 26,600 km
• 3. 18,400 km
• 4. 36,000 km

Question: The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

• 1. Sensors
• 2. Passive sensors
• 3. Active sensors
• 4. None of these

Question: The refractive index of the ocean water_______________?

• 1. Increases with salinity
• 2. Increases with temperature
• 3. Decreases with salinity
• 4. Decreases with temperature

Question: The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called____________________?

• 1. Passive remote sensing
• 2. Active remote sensing
• 3. Neutral remote sensing
• 4. None of these

Question: Which one of the following parameters is accurate for DGPS ?

• 1. Positional accuracies ~ 1 – 2 m if rover is less than 1-2 km from the reference station
• 2. Positional accuracies ~ 2 – 5m if rover is less than 2-5 fm from the reference station
• 3. Positional accuracies ~ 5 – 10 m if rover is less than 5-10 km from reference station
• 4. Positional accuracies ~ 5 – 10 m if rover is less than 25 km

Question: Due to scan geometry of a satellite sensor____________________?

• 1. The off-nadir resolution is degraded
• 2. The ground distance swept by the senor, IFOV is proportional to sec2 of scan measured from the nadir
• 3. The details towards the edge of the scan get compressed
• 4. All of these

Question: The altitudinal distance of a geostationary satellite from the earth is about_________________?

• 1. 26,000 km
• 2. 30,000 km
• 3. 36,000 km
• 4. 44,000 km

Question: Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?

• 1. Electric waves
• 2. Sound waves
• 3. Electromagnetic waves
• 4. Wind waves

Question: The object of photo-interpretation is__________________?

• 1. Identification
• 2. Recognition of objects
• 3. Judging the significance of objects
• 4. All of these

Question: Pick up the correct statement from the following ?

• 1. A graphical representation of spectral reflectance verses the various growth stages of a crop, depicts a phonologic pattern
• 2. The changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation
• 3. The degree of polarisation is a characteristic of the object which helps in the identification of the object
• 4. All of these