पृथ्वीभोवती फिरणाऱ्या उपग्रहांचे प्रक्षेपण आणि त्यांच्या कक्षीय भ्रमणाकडे लक्ष ठेवण्यासाठी भारतात 'उपग्रह नियंत्रक केंद्र' (ISTRAC) विविध ठिकाणी आहेत. त्या जागा कोणत्या ?

The correct answer is Option B (Bangalore, Lucknow, Sriharikota, Port Blair, Thiruvananthapuram, Hyderabad).

Key Points:
• ISTRAC (ISRO Telemetry, Tracking and Command Network):
• Headquartered in Bengaluru, ISTRAC operates telemetry, tracking, and command (TTC) ground stations across India and overseas to monitor launch vehicles and orbiting spacecraft.
• Ground Station Network Nodes across India:
• Bengaluru (Headquarters and Mission Operations Complex - MOX)
• Lucknow (Primary TTC station in North India)
• Sriharikota (SHAR) (Launch tracking TTC stations)
• Port Blair (Andaman & Nicobar) (Downrange sea tracking ground station)
• Thiruvananthapuram (Downrange telemetry station)
• Hyderabad (National Remote Sensing Centre earth station network)
• Therefore, Option 2 accurately groups the primary domestic ISTRAC satellite tracking network stations.
• Key Takeaway: ISTRAC's primary satellite tracking and telemetry network includes Bangalore, Lucknow, Sriharikota, Port Blair, Thiruvananthapuram, and Hyderabad.