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{{Use dmy dates|date=February 2023}}
{{Use Indian English|date=February 2023}}
{{Infobox spaceflight
| name = Jugnu
| image =
| image_caption =

| mission_type = Remote Sensing Technology
| operator = [[Indian Institute of Technology Kanpur|IIT Kanpur]]
| website =
| COSPAR_ID = 2011-058B
| SATCAT =
| mission_duration =

| spacecraft_bus =
| manufacturer =
| dry_mass =
| launch_mass = {{convert|3|kg}}
| power =

| launch_date = {{start-date|12 October 2011}}
| launch_rocket = [[Polar Satellite Launch Vehicle|PSLV-CA]] C18
| launch_site = [[Satish Dhawan Space Centre|Satish Dhawan]] [[Satish Dhawan Space Centre First Launch Pad|FLP]]
| launch_contractor = [[ISRO]]

| last_contact = 
| decay_date =

| orbit_epoch =
| orbit_reference = [[geocentric orbit|Geocentric]]
| orbit_regime = [[Low Earth orbit|Low Earth]]
| orbit_periapsis =
| orbit_apoapsis =
| orbit_inclination =
| orbit_period =
| apsis = gee
}}

'''Jugnu''' ({{lang-hi|जुगनू}}), is an Indian technology demonstration and [[remote sensing]] [[CubeSat]] satellite which was operated by the [[Indian Institute of Technology Kanpur]]. Built under the guidance of Dr. N. S. Vyas, it is a nanosatellite which will be used to provide data for agriculture<ref name="SD-160209">{{cite web|url=http://www.spacedaily.com/reports/IIT_K_Satellite_Jugnu_In_Final_Stages_999.html|archive-url=https://archive.today/20110606161604/http://www.spacedaily.com/reports/IIT_K_Satellite_Jugnu_In_Final_Stages_999.html|url-status=dead|archive-date=6 June 2011|title=IIT-K Satellite Jugnu In Final Stages|date=16 February 2009|publisher=Space Daily|access-date=21 March 2010}}</ref> and disaster monitoring.<ref name="UN">{{cite web|url=http://www.un-spider.org/news-en/3314/2010-03-09t113500/jugnu-nano-satellite|title='JUGNU' NANO-SATELLITE|last=Podprocky|first=Peter|date=9 March 2010|publisher=United Nations Platform for Space-based Information for Disaster Management and Emergency Response|access-date=21 March 2010|archive-url=https://web.archive.org/web/20110412070615/http://www.un-spider.org/news-en/3314/2010-03-09t113500/jugnu-nano-satellite|archive-date=12 April 2011|url-status=dead}}</ref> It is a {{convert|3|kg|adj=on}} spacecraft, which measures {{convert|34|cm}} in length by {{convert|10|cm}} in height and width. Its development programme cost around 25 million rupee.<ref name="IWS">{{cite web|url=http://indianwebstartups.com/PRDetails.aspx?pressrelease=781|title=ISRO to Launch 'Jugnu' Satellite Made by IIT-Kanpur |date=25 February 2010|publisher=Indian Web Startups|access-date=21 March 2010}}</ref> It has a design life of one year.<ref name="Goals">{{cite web|url=http://www.iitk.ac.in/me/jugnu/index.htm|title=Introduction|work=Jugnu|publisher=Indian Institute of Technology Kanpur|access-date=21 March 2010|url-status=dead|archive-url=https://web.archive.org/web/20110121072340/http://www.iitk.ac.in/me/jugnu/index.htm|archive-date=21 January 2011}}</ref>

Jugnu was launched on 12 October 2011 into [[low Earth orbit]] by a [[Polar Satellite Launch Vehicle|PSLV-CA]] C18.<ref>{{cite news|url=http://timesofindia.indiatimes.com/india/PSLV-C18-carrying-weather-satellite-launched/articleshow/10323961.cms|title=PSLV-C18 carrying weather satellite launched | work=The Times Of India}}</ref>

==Subsystems<ref name="Subsystems">{{cite web|url=http://www.iitk.ac.in/me/jugnu/subsystems.htm|title=Satellite Subsystems|work=Jugnu|publisher=Indian Institute of Technology Kanpur|url-status=dead|archive-url=https://web.archive.org/web/20110121072350/http://www.iitk.ac.in/me/jugnu/subsystems.htm|archive-date=2011-01-21}}</ref>==

===Imaging===
This Subsystem captures [[near infrared|near IR]] images of targeted surface on earth which helps in identification of the utilization of the place. The subsystem consists of a "Near IR camera", an external storage and an On-Board Computer(OBC) which acts as an interface between the two, apart carrying out the image compression/processing.
The camera captures a 640X480 px image which is then transferred to an external memory by the OBC. The image is then processed (if required) and transmitted to the ground station. An overall resolution of about 161 X 161 ''m''''2'' per pixel is expected on earth's surface.
The total area of view, on earth's surface is expected to be around 103 X 77 ''km''''2''.

===GPS===
The [[Global Positioning System|GPS]] payload in Jugnu helps in synchronizing the time of OBC from the time data retrieved from the GPS module. The Orbital Parameters from the GPS is fed into the ADCS system which assists in satellite positioning from time to time.

===ADCS===
The Attitude Determination and Control System (ADCS) orients the satellite in a manner such that maximum solar energy is incident on its solar panels. During imaging the satellite must point at a fixed location on earth in order to capture high-quality images, which is accomplished by the ADCS. Control by the ADCS is necessary to ensure that the antennas, which have narrow beams, are pointed correctly towards the earth. Gravitational forces from the sun, moon, and planets; solar pressure acting on the antennas and satellite body; and magnetic fields create rotational disturbances. Since the satellite moves around the earth's center in its orbit, the forces described above vary cyclically. This tends to set up nutation of the satellite which is damped using ADCS.<ref>{{cite web|title=Jugnu Nanosat ADCS System|url=http://home.iitk.ac.in/~vyas/Jugnu/adcs.html|website=iitk.ac.in|access-date=May 14, 2023}}</ref>

===Thermal===
The Thermal Control Subsystem (TCS) maintains the temperature within the specified limit of 298K to 323K. It ensures that no large thermal gradients and no excessive thermal stress across the structures occur.
The Thermal control subsystem of JUGNU is essentially passive with [[Multi-layer insulation|MLI]] sheets, [[Optical solar reflector|OSR]] and surface coatings as key components. It also has IC and [[thermocouple]] based sensors to provide for the feedback and maintain the health of sensitive IC's and Camera. The heat that is produced at the chip level is rapidly distributed to the system to prevent it from getting damaged.

===Other Subsytems===
'''[[Inertial Measurement Unit]]''' (IMU) system is used to measure vibrations in the satellite and angular rate of the satellite which is used to test the performance of the MEMS based sensors and to provide position and orientation data to OBC.
'''Ejection Subsystem''' is the interface between the satellite and the rocket. It is a box like structure that is bolted on the deck of the rocket nose top with the satellite placed inside that box. It separates from the rocket with small initial
velocity imparted by a spring sitting at the base of the ejection system. It is an indigenous ejection system which can be used for future launches.<ref name="Talk Tribune">{{cite web|url=http://www.tribuneindia.com/2011/20111014/main5.htm|title=With little Jugnu, IIT-Kanpur takes a giant leap into space|work=The Tribune}}</ref>

==Mission Goals and Objectives<ref name="Mission Objectives and Goals">{{cite web|url=http://www.iitk.ac.in/me/jugnu/objectives.htm|title=Objectives|work=Jugnu|publisher=Indian Institute of Technology Kanpur|url-status=dead|archive-url=https://web.archive.org/web/20110121072656/http://www.iitk.ac.in/me/jugnu/objectives.htm|archive-date=2011-01-21}}</ref>==
The main goal of the mission was to make a Nano Satellite at [[Indian Institute of Technology Kanpur|IIT Kanpur]] that can be used as Micro Imaging Systems, GPS receiver for locating the position of satellite in the orbit and MEMS based Inertial Measurement Unit(IMU). 
The Primary Objectives of the mission were:
# To initiate research activities towards development of MEMS based Nano-satellite.
# To test new cheap solutions for the future cost effective space missions.
# To set the path for future up gradations and study such validation concepts for possible up gradations.

Its long term objectives were:
# To develop competence in design, fabrication and usage of micro satellites.
# Complement the development efforts of India's satellite application requirements through technology development and validation at the micro satellite level.
# Development and training of human resources.
# Strengthen activities in MEMS sensor based technology applications.

==References==
{{Portal|Spaceflight}}
{{reflist}}

{{Orbital launches in 2011}}
{{Indian spacecraft}}

[[Category:IIT Kanpur]]
[[Category:CubeSats of India]]
[[Category:Student satellites]]
[[Category:Spacecraft launched in 2011]]
[[Category:2011 in India]]

Jugnu (satellite) - Revision history

Ajay Kumar: Created a new article