MCQ
Satellite Meteorology MCQ - Practice Questions with Answers
Solve 26 Satellite Meteorology questions for RAS/RPSC preparation.
Practice questions
Q1Consider the following statements about satellite imagery: 1. Visible satellite imagery can only be viewed during the day because it depends on reflected sunlight. 2. Infrared satellite imagery can show clouds during both day and night. 3. Water-vapor imagery directly measures surface wind speed over oceans. Which of the statements given above are correct?
Statement 1 is correct: visible imagery depends on reflected sunlight, so it is daytime imagery. Statement 2 is correct: infrared imagery identifies clouds from emitted heat and works by day and night. Statement 3 is incorrect: water-vapor imagery indicates upper-atmospheric moisture; ocean surface wind vectors are a scatterometer-type product.
Q2Consider the following statements about ocean-related satellite meteorology: 1. SCATSAT-1 carries a Ku-band scatterometer that provides ocean-surface wind vector data for weather forecasting, cyclone detection and tracking. 2. Oceansat-2 carries an Ocean Colour Monitor, a Ku-band Pencil Beam scatterometer and ROSA. 3. Microwave backscatter measured by a scatterometer over oceans can be used to derive surface wind speed and direction. 4. A scatterometer's primary function is to measure only total ozone profiles over land. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct. ISRO links SCATSAT-1 wind vectors to forecasting and cyclone monitoring, lists Oceansat-2 payloads, and NASA explains scatterometer wind retrieval from microwave backscatter. Statement 4 is false because the cited scatterometer role is ocean-surface wind, not only land ozone profiles.
Q3Consider the following statements about meteorological satellite orbits: 1. WMO describes the space-based observing backbone as including Sun-synchronous low Earth orbit satellites and a ring of geostationary Earth orbit satellites. 2. Geostationary visible/infrared imaging is especially suited to very frequent and constant sampling of rapidly evolving phenomena. 3. Sun-synchronous satellites are preferred mainly because they hover continuously over one fixed point on Earth's surface. 4. Polar-orbiting satellite measurements for a particular region are updated continuously like GOES observations. Which of the statements given above are correct?
Statements 1 and 2 are correct: WMO describes both Sun-synchronous LEO and GEO components, and notes that GEO VIS/IR imaging supports very frequent sampling of fast-changing phenomena. Statement 3 is false because hovering over one surface position is the geosynchronous/GOES feature, not the main description of Sun-synchronous orbit. Statement 4 is false because NOAA says polar-orbiter measurements for a region are not updated continuously like GOES.
Q4Consider the following statements about the space-based component of meteorological observation: 1. Space-based meteorological observations are performed through satellite programmes implemented by space agencies. 2. International coordination among satellite operators is achieved through the Coordination Group for Meteorological Satellites. 3. The primary goal of this coordination is mineral exploration, not weather monitoring or climate monitoring. Which of the statements given above are correct?
Statements 1 and 2 are correct as per WMO. Statement 3 is incorrect: WMO states that the coordination supports operational weather monitoring and forecasting as well as climate monitoring.
Q5Consider the following statements about Sun-synchronous low Earth orbit satellites in meteorology: 1. They provide global coverage useful for global numerical weather prediction. 2. They are useful for polar meteorology and climatology. 3. For these applications, very frequent sampling is more critical than global coverage and high accuracy. Which of the statements given above are correct?
Statements 1 and 2 are correct. Statement 3 is incorrect because WMO says very frequent sampling is less critical than global coverage and high accuracy for these applications.
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6Consider the following statements about INSAT-3D services and orbit: 1. Its payloads augment meteorological as well as search and rescue services. 2. ISRO lists its orbit as geostationary at 82 degrees East longitude. 3. ISRO lists its orbit as a polar Sun-synchronous orbit. Which of the statements given above are correct?
7Consider the following statements about ocean-observing satellites used in weather applications: 1. SCATSAT-1 carries a Ku-band Scatterometer. 2. SCATSAT-1 provides ocean surface wind-vector data useful for cyclone detection and tracking. 3. SARAL's main instrument is a 19-channel atmospheric Sounder for INSAT-type vertical temperature profiles. Which of the statements given above are correct?
8Consider the following statements about Oceansat-2 applications: 1. Oceansat-2 data are used for identification of potential fishing zones. 2. Oceansat-2 data provide inputs for weather forecasting and climatic studies. 3. Oceansat-2 is cited by ISRO as carrying only a Search and Rescue Transponder. Which of the statements given above are correct?
9Consider the following statements about INSAT-3DS meteorological observations: 1. Its 6-channel imager captures images across multiple spectral channels to gather information on clouds, aerosols, land surface temperature, vegetation health and water-vapour distribution. 2. Its 19-channel sounder captures radiation emitted by atmospheric constituents such as water vapour, ozone and carbon dioxide, and helps measure temperature variations in atmospheric layers. 3. Its payloads generate geophysical products such as sea surface temperature, rainfall, fog intensity, outgoing longwave radiation and atmospheric motion vectors. 4. The vertical structure of the atmosphere derived from the data is stated to be irrelevant to weather forecasting. Which of the statements given above are correct?
10Consider the following statements about payloads of INSAT-3D: 1. It carries a 6-channel multi-spectral Imager. 2. It carries a 19-channel Sounder. 3. It carries an Ocean Colour Monitor as one of the four payloads listed by ISRO for INSAT-3D. Which of the statements given above are correct?
11Consider the following statements about infrared satellite imagery: 1. It uses heat radiated by clouds and the Earth's surface rather than reflected sunlight. 2. It can help determine thunderstorm intensity. 3. It cannot be used at night because clouds do not reflect sunlight then. Which of the statements given above are correct?
12Consider the following statements about INSAT-3D meteorological payloads: 1. INSAT-3D has meteorological payloads consisting of an Imager and a Sounder, along with a Data Relay Transponder and a satellite-aided search and rescue payload. 2. The INSAT-3D imager observes the Earth disc from geostationary altitude in one visible band and five infrared bands. 3. The water-vapour band of the INSAT-3D imager has nominal 1 km x 1 km ground resolution at the sub-satellite point. 4. The INSAT-3D sounder's objective includes measuring vertical distributions of atmospheric temperature and humidity. Which of the statements given above are correct?
13Consider the following statements about polar-orbiting and geostationary weather satellites: 1. Polar-orbiting satellites provide imagery and atmospheric soundings over the entire Earth. 2. Geostationary satellites can take pictures of the same Earth location at regular intervals. 3. Geostationary satellites are mainly useful because they pass close to both poles on every orbit. Which of the statements given above are correct?
14Consider the following statements about the GOES-R Advanced Baseline Imager: 1. ABI is the primary GOES-R Series instrument for imaging Earth's weather, oceans and environment. 2. ABI observes Earth in 16 spectral bands, including visible, near-infrared and infrared channels. 3. ABI is an active microwave radar whose main meteorological role is to transmit pulses and measure backscatter from ocean winds. 4. In continuous full-disk mode, ABI can produce a Western Hemisphere image every five minutes. Which of the statements given above are correct?
15Consider the following statements about INSAT-3D: 1. INSAT-3D is an advanced weather satellite of India. 2. It is designed to generate vertical profiles of the atmosphere in terms of temperature and humidity. 3. Its main meteorological role is underground mineral mapping rather than weather forecasting and disaster warning. Which of the statements given above are correct?