List of top Questions asked in GATE Geomatics Engineering

The relativistic effect in Global Navigation Satellite System satellites has two parts, of which the first part is the time dilation due to the shift in the fundamental frequency of the satellite clock. The second part is due to the satellite’s semi-major axis and __________

Match the following SAR sensors to their frequency bands:

\[ \begin{array}{|c|l|c|l|} \hline \textbf{Column I} & \textbf{SAR Sensor} & \textbf{Column II} & \textbf{Frequency Band} \\ \hline P & \text{NOVASAR} & 1 & \text{X-BAND} \\ Q & \text{RISAT-1} & 2 & \text{C-BAND} \\ R & \text{TERRASAR} & 3 & \text{L-BAND} \\ S & \text{ALOS PALSAR} & 4 & \text{S-BAND} \\ \hline \end{array} \]

The covariance matrix, \( \Sigma \), for the planar coordinates of a surveyed point is given as:

\[ \Sigma = \begin{bmatrix} 25 & 0.500 \\ 0.500 & 100 \end{bmatrix} \quad \text{(in mm}^2\text{)} \] The coefficient of correlation is __________ (rounded off to 2 decimal places).

In a two-dimensional coordinate system, it is proposed to determine the size and shape of a triangle ABC in addition to its location and orientation. For this, all the internal angles and sides of the triangle were observed. Further, the planar coordinates of point A and bearing/azimuth of line AB were known. The redundancy (\( r \)) for the above system will be equal to _________ (Answer in integer).

For the weighted least squares adjustment, which of the following statements is/are correct?

Find the best match between column I and column II for the following scenario related to spatial operators.

The table below is an attribute table about employee records. Which attribute can be used as a primary key?

Employee	Name	Designation	Department
(Emp_ID)	(Emp_Name)	(Emp_Desig)	(Emp_Dept)
100260	Prashant	Software Developer	Information Technology
100265	Dinesh	Junior Engineer	Embedded System
100252	Somya	HR Manager	Management
100271	Dinesh	Junior Engineer	Information Technology

Which one of the following statements is NOT correct in the context of Geographic Information System?

In the choke ring antenna there are concentric cylinders placed around the antenna that are of a certain depth to minimize the multipath effect. If the signal wavelength is \( \lambda \), then the depth of the cylinders in the choke ring antenna should be

In the context of Global Navigation Satellite System positioning, which of the following statement is correct?

In the context of Global Navigation Satellite System positioning, the Saastamoinen model provides a correction for ____________

If the emissivity of an object varies with wavelength, it is called as __________

Clouds appear white in optical visible spectral bands of remote sensing images due to _________ scattering.

The reflectance geometry of white-sky albedo can be represented as __________

For a sample drawn from a normally distributed population, the statistic \[ Y = \frac{(n-1)s^2}{\sigma^2} \] where \( n \) = sample size, \( \sigma \) = population standard deviation, and \( s \) = sample standard deviation, has

Which one of the following techniques is NOT used to atmospherically correct the satellite image?

Which one of the following is NOT used to assess the quality of remote sensing image?

Which one of the following image processing methods employs standard deviation?

A remote sensing instrument measures only in Green, Red and Near-Infrared frequency bands. The remote sensing index/indices that CANNOT be derived using data of this instrument is/are:

In a closed traverse with five sides, the closing error found from the fore bearing and back bearing of the last line is $+0.5^\circ$. The correction to the fourth line will be:

When conducting a survey using a total station, a zenith angle is measured as $84^\circ13'56''$ in the direct mode. What is the equivalent zenith angle in the reverse mode?

For a given set of observations for distance measurements, the standard error was computed as \( \pm 2.5 \, {cm} \). Assuming that the observations conform to normal error distribution theory, the probable error will be given by \( \pm \, \underline{{1.5cm}} \, {cm} \) (rounded off to 2 decimal places).

The geophysical variables that can be measured/derived from the Global Navigation Satellite System observations is/are

Which one of the following statements is NOT correct in the context of shapefile?

If the absolute temperature (greater than 0 K) of a body is doubled, it would emit \underline{{2cm} times more radiation.}