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GPS Spoofing, RBI Repo Rate Hold & Heatwave Criteria — UPSC Prelims SEE Snapshot

The snapshot covers three UPSC‑relevant topics: the security implications of GPS spoofing and jamming, the RBI’s decision to keep the repo rate at 5.25% while projecting slower GDP growth, and IMD’s criteria for declaring heatwaves, including the wet‑bulb effect and heat‑dome phenomenon. Mastering these concepts will aid candidates in GS3 questions on technology, economy, and environment.
In this edition of the UPSC Prelims ‘SEE’ Snapshot we examine three current themes – the security threat of GPS spoofing and GPS jamming , the Reserve Bank of India's (RBI) decision to keep the repo rate unchanged, and the Indian Meteorological Department’s (IMD) criteria for declaring a heatwave . Each topic is linked to UPSC‑relevant concepts and potential exam questions. Key Developments In the ongoing US‑Iran conflict, navigation systems of ships and aircraft have been disrupted by GPS interference , highlighting the strategic importance of GPS spoofing and GPS jamming . On April 8, 2026 the Monetary Policy Committee (MPC) kept the policy repo rate at 5.25% . The RBI projected GDP growth to fall to 6.9% in 2026‑27 from 7.6% in 2025‑26, while headline retail inflation is expected to average 4.6% this fiscal year. IMD has issued repeated heatwave alerts for Punjab and Haryana in April 2026, marking an earlier onset of extreme heat compared with the traditional May‑June window. Important Facts Global Navigation Satellite Systems (GNSS) include GPS , Europe’s Galileo , Russia’s GLONASS , China’s BeiDou and India’s NavIC . Monetary Policy is guided by the May 2016 amendment to the RBI Act, which gave the central bank a legislative mandate. RBI tools: repo rate , reverse repo rate, Marginal Standing Facility (MSF), Liquidity Adjustment Facility (LAF), Cash Reserve Ratio (CRR), Open Market Operations (OMOs) and Market Stabilisation Scheme (MSS). IMD declares a heatwave when the maximum temperature reaches ≥ 40°C in plains (≥ 37°C coastal, ≥ 30°C hilly) or when the departure from normal exceeds 4.5°C . A 6.4°C or actual maximum ≥47°C in plains, leading to higher mortality risk (GS3: Environment)">severe heatwave is signalled at ≥ 47°C actual maximum. Heatwave declaration requires the criteria to be met at a minimum of two stations in a meteorological sub‑division for two consecutive days, with the announcement made on the second day. Physiological stress intensifies when high temperature coincides with high humidity, known as the wet bulb effect. A heat dome can sustain heatwave conditions for days to weeks. UPSC Relevance These topics intersect with multiple GS papers. GPS spoofing and GPS jamming relate to modern cyber‑warfare, a frequent UPSC theme under security and technology. Understanding the distinction between these attacks and traditional threats such as Trojan horse and Phishing helps answer comparative questions. The RBI’s policy stance, the role of the MPC , and the suite of monetary instruments are core GS3 material, especially when contrasted with fiscal policy mechanisms. Heatwave definitions, the wet‑bulb factor, and the concept of a heat dome are vital for environmental and disaster‑management questions, linking climate variability to public health. Way Forward for Aspirants Memorise the technical differences between GPS spoofing and GPS jamming , and be ready to compare them with classic cyber‑threats. Recall the current repo rate ( 5.25% ), the RBI’s growth projection ( 6.9% for 2026‑27), and the key monetary tools; understand the voting mechanism of the MPC (majority rule with Governor’s casting vote). Learn IMD’s heatwave thresholds and the role of the wet bulb factor; be able to differentiate a heatwave from a heat dome . Practice MCQs that test conceptual clarity rather than rote memorisation, as illustrated by the sample question at the end of the article.
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Overview

gs.gs384% UPSC Relevance

GPS spoofing, RBI repo hold & heatwave thresholds – key UPSC exam triggers

Key Facts

  1. GPS spoofing = transmission of counterfeit GPS signals; GPS jamming = overpowering authentic signals with strong radio emissions (GS3).
  2. Global Navigation Satellite Systems (GNSS) include GPS, Galileo, GLONASS, BeiDou and India's NavIC.
  3. On 8 April 2026, RBI's Monetary Policy Committee kept the policy repo rate at 5.25%, projecting GDP growth of 6.9% for FY 2026‑27 and average inflation of 4.6%.
  4. IMD declares a heatwave when max temperature ≥40°C (plains), ≥37°C (coastal), ≥30°C (hilly) or temperature departure >4.5°C; severe heatwave at ≥47°C (plains).
  5. Heatwave alert requires the criteria to be met at a minimum of two stations in a sub‑division for two consecutive days, with announcement on the second day.
  6. Wet‑bulb temperature combines heat and humidity, indicating physiological stress during heatwaves.
  7. A heat dome is a persistent high‑pressure system that traps warm air, prolonging extreme heat events.

Background & Context

These developments intersect with UPSC GS‑3: GPS spoofing/jamming raise cyber‑security concerns for defence and civil aviation; RBI's repo‑rate hold reflects monetary policy tools and inflation targeting under the RBI Act (2016 amendment); and IMD's heatwave criteria link climate variability to public‑health and disaster‑management challenges.

UPSC Syllabus Connections

GS3•Indian Economy - Planning, mobilization of resources, growth, development and employmentEssay•Economy, Development and InequalityPrelims_CSAT•Decision MakingGS2•Government policies and interventions for developmentGS3•Cyber security and communication networks in internal securityGS4•Information sharing, transparency, RTI, codes of ethics and conductGS2•Effect of policies of developed and developing countries on IndiaGS3•IT, Space, Computers, Robotics, Nano-technology, Bio-technology and IPREssay•International Relations and GeopoliticsGS3•Government Budgeting

Mains Answer Angle

In Mains, candidates can discuss (a) the strategic implications of GNSS interference for internal security (GS‑3), (b) the RBI's monetary stance, tools and growth‑inflation trade‑off (GS‑3/Economy), or (c) heatwave management within climate‑change adaptation and health policy (GS‑3/Environment).

Full Article

<p>In this edition of the UPSC Prelims ‘SEE’ Snapshot we examine three current themes – the security threat of <span class="key-term" data-definition="GPS spoofing — deliberate transmission of counterfeit GPS signals to mislead navigation receivers; a key concern for defence and civil aviation (GS3: Science & Technology)">GPS spoofing</span> and <span class="key-term" data-definition="GPS jamming — emission of strong radio signals on GPS frequencies that overpower authentic satellite signals, rendering receivers unable to determine position or time (GS3: Science & Technology)">GPS jamming</span>, the Reserve Bank of India's (RBI) decision to keep the <span class="key-term" data-definition="repo rate — the rate at which the RBI lends short‑term funds to commercial banks against government securities; a primary tool for monetary policy (GS3: Economy)">repo rate</span> unchanged, and the Indian Meteorological Department’s (IMD) criteria for declaring a <span class="key-term" data-definition="Heatwave — a period of abnormally high temperatures as defined by IMD thresholds for plains, coastal and hilly regions; relevant for environmental and health policy (GS3: Environment)">heatwave</span>. Each topic is linked to UPSC‑relevant concepts and potential exam questions.</p> <h3>Key Developments</h3> <ul> <li>In the ongoing US‑Iran conflict, navigation systems of ships and aircraft have been disrupted by <strong>GPS interference</strong>, highlighting the strategic importance of <span class="key-term" data-definition="GPS spoofing — deliberate transmission of counterfeit GPS signals to mislead navigation receivers; a key concern for defence and civil aviation (GS3: Science & Technology)">GPS spoofing</span> and <span class="key-term" data-definition="GPS jamming — emission of strong radio signals on GPS frequencies that overpower authentic satellite signals, rendering receivers unable to determine position or time (GS3: Science & Technology)">GPS jamming</span>.</li> <li>On <strong>April 8, 2026</strong> the <span class="key-term" data-definition="Monetary Policy Committee (MPC) — a six‑member body (three RBI officials, three external members) that decides the RBI’s policy repo rate to achieve inflation targets (GS3: Economy)">Monetary Policy Committee (MPC)</span> kept the policy repo rate at <strong>5.25%</strong>. The RBI projected GDP growth to fall to <strong>6.9%</strong> in 2026‑27 from <strong>7.6%</strong> in 2025‑26, while headline retail inflation is expected to average <strong>4.6%</strong> this fiscal year.</li> <li>IMD has issued repeated heatwave alerts for Punjab and Haryana in April 2026, marking an earlier onset of extreme heat compared with the traditional May‑June window.</li> </ul> <h3>Important Facts</h3> <ul> <li>Global Navigation Satellite Systems (GNSS) include <strong>GPS</strong>, Europe’s <strong>Galileo</strong>, Russia’s <strong>GLONASS</strong>, China’s <strong>BeiDou</strong> and India’s <strong>NavIC</strong>.</li> <li><span class="key-term" data-definition="Monetary Policy — RBI’s use of instruments such as repo rate, reverse repo, CRR, and open market operations to achieve price stability and support growth (GS3: Economy)">Monetary Policy</span> is guided by the <strong>May 2016</strong> amendment to the RBI Act, which gave the central bank a legislative mandate.</li> <li>RBI tools: <span class="key-term" data-definition="repo rate — the rate at which the RBI lends short‑term funds to commercial banks against government securities; a primary tool for monetary policy (GS3: Economy)">repo rate</span>, reverse repo rate, Marginal Standing Facility (MSF), Liquidity Adjustment Facility (LAF), Cash Reserve Ratio (CRR), Open Market Operations (OMOs) and Market Stabilisation Scheme (MSS).</li> <li>IMD declares a heatwave when the maximum temperature reaches ≥<strong>40°C</strong> in plains (≥<strong>37°C</strong> coastal, ≥<strong>30°C</strong> hilly) or when the departure from normal exceeds <strong>4.5°C</strong>. A <span class="key-term" data-definition="Severe heatwave — a heatwave with temperature departure >6.4°C or actual maximum ≥47°C in plains, leading to higher mortality risk (GS3: Environment)">severe heatwave</span> is signalled at ≥<strong>47°C</strong> actual maximum.</li> <li>Heatwave declaration requires the criteria to be met at a minimum of two stations in a meteorological sub‑division for two consecutive days, with the announcement made on the second day.</li> <li>Physiological stress intensifies when high temperature coincides with high humidity, known as the <span class="key-term" data-definition="wet bulb — a measure that combines temperature and humidity, indicating the perceived heat stress on humans; crucial for health‑related disaster management (GS3: Environment)">wet bulb</span> effect.</li> <li>A <span class="key-term" data-definition="heat dome — a persistent high‑pressure system that traps warm air over a region, prolonging extreme heat and potentially spawning heatwaves (GS3: Environment)">heat dome</span> can sustain heatwave conditions for days to weeks.</li> </ul> <h3>UPSC Relevance</h3> <p>These topics intersect with multiple GS papers. <span class="key-term" data-definition="GPS spoofing — deliberate transmission of counterfeit GPS signals to mislead navigation receivers; a key concern for defence and civil aviation (GS3: Science & Technology)">GPS spoofing</span> and <span class="key-term" data-definition="GPS jamming — emission of strong radio signals on GPS frequencies that overpower authentic satellite signals, rendering receivers unable to determine position or time (GS3: Science & Technology)">GPS jamming</span> relate to modern cyber‑warfare, a frequent UPSC theme under security and technology. Understanding the distinction between these attacks and traditional threats such as <strong>Trojan horse</strong> and <strong>Phishing</strong> helps answer comparative questions.</p> <p>The RBI’s policy stance, the role of the <span class="key-term" data-definition="Monetary Policy Committee (MPC) — a six‑member body (three RBI officials, three external members) that decides the RBI’s policy repo rate to achieve inflation targets (GS3: Economy)">MPC</span>, and the suite of monetary instruments are core GS3 material, especially when contrasted with fiscal policy mechanisms.</p> <p>Heatwave definitions, the wet‑bulb factor, and the concept of a <span class="key-term" data-definition="heat dome — a persistent high‑pressure system that traps warm air over a region, prolonging extreme heat and potentially spawning heatwaves (GS3: Environment)">heat dome</span> are vital for environmental and disaster‑management questions, linking climate variability to public health.</p> <h3>Way Forward for Aspirants</h3> <ul> <li>Memorise the technical differences between <span class="key-term" data-definition="GPS spoofing — deliberate transmission of counterfeit GPS signals to mislead navigation receivers; a key concern for defence and civil aviation (GS3: Science & Technology)">GPS spoofing</span> and <span class="key-term" data-definition="GPS jamming — emission of strong radio signals on GPS frequencies that overpower authentic satellite signals, rendering receivers unable to determine position or time (GS3: Science & Technology)">GPS jamming</span>, and be ready to compare them with classic cyber‑threats.</li> <li>Recall the current repo rate (<strong>5.25%</strong>), the RBI’s growth projection (<strong>6.9%</strong> for 2026‑27), and the key monetary tools; understand the voting mechanism of the <span class="key-term" data-definition="Monetary Policy Committee (MPC) — a six‑member body (three RBI officials, three external members) that decides the RBI’s policy repo rate to achieve inflation targets (GS3: Economy)">MPC</span> (majority rule with Governor’s casting vote).</li> <li>Learn IMD’s heatwave thresholds and the role of the <span class="key-term" data-definition="wet bulb — a measure that combines temperature and humidity, indicating the perceived heat stress on humans; crucial for health‑related disaster management (GS3: Environment)">wet bulb</span> factor; be able to differentiate a heatwave from a <span class="key-term" data-definition="heat dome — a persistent high‑pressure system that traps warm air over a region, prolonging extreme heat and potentially spawning heatwaves (GS3: Environment)">heat dome</span>.</li> <li>Practice MCQs that test conceptual clarity rather than rote memorisation, as illustrated by the sample question at the end of the article.</li> </ul>
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Analysis

Practice Questions

GS3
Easy
Prelims MCQ

Cyber security & navigation systems

1 marks
4 keywords
GS3
Medium
Mains Short Answer

Monetary policy

5 marks
5 keywords
GS3
Hard
Mains Essay

Environment & disaster management

20 marks
6 keywords
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Key Insight

GPS spoofing, RBI repo hold & heatwave thresholds – key UPSC exam triggers

Key Facts

  1. GPS spoofing = transmission of counterfeit GPS signals; GPS jamming = overpowering authentic signals with strong radio emissions (GS3).
  2. Global Navigation Satellite Systems (GNSS) include GPS, Galileo, GLONASS, BeiDou and India's NavIC.
  3. On 8 April 2026, RBI's Monetary Policy Committee kept the policy repo rate at 5.25%, projecting GDP growth of 6.9% for FY 2026‑27 and average inflation of 4.6%.
  4. IMD declares a heatwave when max temperature ≥40°C (plains), ≥37°C (coastal), ≥30°C (hilly) or temperature departure >4.5°C; severe heatwave at ≥47°C (plains).
  5. Heatwave alert requires the criteria to be met at a minimum of two stations in a sub‑division for two consecutive days, with announcement on the second day.
  6. Wet‑bulb temperature combines heat and humidity, indicating physiological stress during heatwaves.
  7. A heat dome is a persistent high‑pressure system that traps warm air, prolonging extreme heat events.

Background

These developments intersect with UPSC GS‑3: GPS spoofing/jamming raise cyber‑security concerns for defence and civil aviation; RBI's repo‑rate hold reflects monetary policy tools and inflation targeting under the RBI Act (2016 amendment); and IMD's heatwave criteria link climate variability to public‑health and disaster‑management challenges.

UPSC Syllabus

  • GS3 — Indian Economy - Planning, mobilization of resources, growth, development and employment
  • Essay — Economy, Development and Inequality
  • Prelims_CSAT — Decision Making
  • GS2 — Government policies and interventions for development
  • GS3 — Cyber security and communication networks in internal security
  • GS4 — Information sharing, transparency, RTI, codes of ethics and conduct
  • GS2 — Effect of policies of developed and developing countries on India
  • GS3 — IT, Space, Computers, Robotics, Nano-technology, Bio-technology and IPR
  • Essay — International Relations and Geopolitics
Explore:Current Affairs·Editorial Analysis·Govt Schemes·Study Materials·Previous Year Questions·UPSC GPT
  • GS3 — Government Budgeting

    • Mains Angle

    In Mains, candidates can discuss (a) the strategic implications of GNSS interference for internal security (GS‑3), (b) the RBI's monetary stance, tools and growth‑inflation trade‑off (GS‑3/Economy), or (c) heatwave management within climate‑change adaptation and health policy (GS‑3/Environment).

    GPS Spoofing, RBI Repo Rate Hold & Heatwav... | UPSC Current Affairs