Near Earth Object Surveillance Satellite

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Near Earth Object Surveillance Satellite
Mission type Asteroid detection
Operator CSA, DRDC[1]
COSPAR ID 2013-009D
SATCAT № 39089
Mission duration Primary mission: 1 year[2]
Elapsed: 1 year, 7 months and 29 days
Spacecraft properties
Bus Multi-Mission Microsatellite Bus[3]
Manufacturer David Florida Laboratory, Spectro, Microsat Systems[4]
Launch mass 74 kg (163 lb)[5]
Dimensions 1.4 × 0.65 × 0.35 m (4.6 × 2.1 × 1.1 ft)[5]
Power 45 watts[6]
Start of mission
Launch date February 25, 2013, 12:31 (2013-02-25UTC12:31Z) UTC
Rocket PSLV-CA C20
Launch site Satish Dhawan FLP
Contractor ISRO/Antrix
Orbital parameters
Reference system Geocentric
Regime Sun-synchronous[7]
Semi-major axis 7,156.03 km (4,446.55 mi)[8]
Perigee 777 km (483 mi)[8]
Apogee 792 km (492 mi)[8]
Inclination 98.61 degrees[8]
Period 100.41 minutes[8]
Mean motion 14.34[8]
Epoch October 4, 2014, 14:45:40 UTC[8]

The Near Earth Object Surveillance Satellite (NEOSSat)[9] is a Canadian microsatellite using a 15-cm aperture f/5.88 Maksutov telescope similar to that on the MOST spacecraft, 3-axis stabilized with pointing stability of ~2 arcseconds in a ~100 second exposure. It is funded by the Canadian Space Agency (CSA) and Defence Research and Development Canada (DRDC),[1] and will search for interior-to-Earth-orbit (IEO) asteroids,[10][11] at between 45 and 55 degree solar elongation and +40 to -40 degrees ecliptic latitude.[3]


The NEOSSat satellite will carry out three missions.

The spacecraft will demonstrate the utility of the Multi-Mission Microsatellite Bus (MMMB) as part of the CSA's efforts to develop an affordable multi-mission bus.[12][13]

Near Earth Space Surveillance (NESS),[9] led by Principal Investigator Alan Hildebrand of the University of Calgary, will use NEOSSat to search for and track near-Earth asteroids inside Earth's orbit around the Sun, including asteroids in the Aten and Atira classes. These asteroids are particularly difficult to detect from the surface of the Earth, as they are usually positioned in the daylit or twilit sky, when background light from the Sun makes such faint objects invisible. This form of stray light is not an issue for a telescope in orbit, making even a small-aperture telescope such as that on NEOSSat capable of detecting faint asteroids. The NESS science team expects to be able to detect many such asteroids as faint as visual magnitude 19. The NESS mission is funded by the CSA.

High Earth Orbit Space Surveillance (HEOSS),[14] led by Principal Investigator Brad Wallace of DRDC, will use NEOSSat to conduct experimental satellite tracking activities. It will focus principally on satellites in the 15,000 to 40,000 km (9,300 to 24,900 mi) range,[12] such as geostationary communications satellites, which are difficult to track via ground-based radar. These experiments will include submitting tracking data to the Space Surveillance Network, as part of Canada's role in NORAD. The HEOSS activities are intended to support planning for follow-on missions to the Canadian Department of National Defence's operational satellite-tracking satellite, Sapphire, which was launched with NEOSSat. The HEOSS mission is funded by DRDC.


NEOSSat, originally conceived under the name NESS ("Near Earth Space Surveillance"),[15] was proposed by Dynacon in 2000 to DRDC and CSA as a follow-on to the MOST microsatellite mission which was then half-way through its development. As conceived during an initial Phase A study for DRDC, it would have re-used almost all of the equipment designs from MOST, the main addition being a large external baffle to reduce the stray light impinging on the instrument's focal plane, necessary in order to achieve its asteroid detection sensitivity target of magnitude 19.

DRDC's Technology Demonstration Program (TDP) approved CDN$6.5M of funding for NEOSSat in 2003. By mid-2004 CSA had approved the remaining funding needed to initiate the NEOSSat procurement, and with DRDC formed a Joint Program Office to manage the mission development.[16] At this point the spacecraft's name was changed from NESS to NEOSSat. A final Phase A study was carried out under CSA supervision in 2005, and a Phase B/C/D procurement was carried out in 2006/07, with a total development price cap of CDN$9.8M (not including launch cost). Dynacon was selected as prime contractor in 2007, at which point the total development cost was reported as CDN$11.5M, with a target launch date of late 2009.[17] Shortly after that, Dynacon sold its Space division to Microsat Systems Canada Inc. (MSCI), which completed development of NEOSSat.

As development proceeded, while the basic design concept was kept, much of the equipment in the satellite was replaced by new designs in order to meet requirements imposed by the CSA's Multi-Mission Microsatellite Bus program.[14] The basic instrument design was kept, as was the basic structure design, and the attitude control subsystem sensors and actuators; the on-board computers and radios were replaced, the instrument readout electronics was redesigned, and the external instrument "door" was replaced by an internal shutter.

By 2012, the CSA's contribution to program funding had risen by CDN$3.4M to CDN$8.8M, implying a total program contracted-out cost to end of satellite commissioning of CDN$15.4M.[18] However, according to a Canadian Space Agency audit, the total program cost by the end of 2013 was CDN$25M, including both CSA and DRDC costs, with CSA's portion of the cost reported at just under CDN$13M.[19]


NEOSSat was originally scheduled for launch in 2007,[16] but delays set it back until 2013.[20] Alongside another Canadian spacecraft, Sapphire (a military survellience satellite), and five other satellites, NEOSSat launched on February 25, 2013, from the Satish Dhawan Space Centre in Sriharikota, India, at 12:31 UTC aboard an Indian PSLV-C20 rocket.[21][22]

Audit of the NEOSSat program[edit]

In February 2014, the CSA released a report detailing the results of an audit of the NEOSSat program, commissioned by CSA and conducted by external companies.[19] This audit, carried out as "a requirement of the CSA five-year evaluation plan", covers only the period beginning with the signing of the CSA's NEOSSat contracts in 2005 through the end of 2013.[19] News reports highlighted several negative findings of the audit, including delays in the program, and problems experienced by the satellite on-orbit that have kept it from achieving operational status. These problems were mainly attributed to poor performance by the contractor, MSCI, as well as to a perception that the project had been "under-funded by as much as 50 per cent" from the outset.[23] However, MSCI has disputed criticism against the company, saying that program requirements were poorly written and that CSA staff interfered with the satellite's construction.[24]

See also[edit]


  1. ^ a b "NEOSSat: Canada's Sentinel in the Sky". Canadian Space Agency. February 25, 2013. Retrieved March 13, 2013. 
  2. ^ National Research Council (2009). Near-Earth Object Surveys and Hazard Mitigation Strategies: Interim Report. Washington, D.C.: National Academies Press. p. 15. ISBN 0-309-14361-6. OCLC 609851795. 
  3. ^ a b Szondy, David (February 21, 2013). "First asteroid-tracking satellite will be Canadian". Gizmag. Retrieved March 13, 2013. 
  4. ^ "Partners". University of Calgary. 2013. Retrieved March 13, 2013. 
  5. ^ a b "The Satellite". University of Calgary. 2013. Retrieved March 13, 2013. 
  6. ^ "NEOSSat Specs". 2013. Retrieved March 13, 2013. 
  7. ^ Clark, Stephen (February 23, 2013). "Canadian asteroid-hunting satellite to launch Monday". Archived from the original on March 13, 2013. 
  8. ^ a b c d e f g "NEOSSAT Satellite details 2013-009D NORAD 39089". N2YO. October 4, 2014. Retrieved October 5, 2014. 
  9. ^ a b Hildebrand, A. R.; Tedesco, E. F.; Carroll, K. A.; Cardinal, R. D.; Matthews, J. M. et al. (2008). "The Near Earth Object Surveillance Satellite (NEOSSat) Mission Will Conduct an Efficient Space-Based Asteroid Survey at Low Solar Elongations". 10th Asteroids, Comets, Meteors. Baltimore, Maryland. July 14–18, 2008. Bibcode:2008LPICo1405.8293H. Paper id 8293. 
  10. ^ Spears, Tom (May 2, 2008). "Canada space mission targets asteroids". Calgary Herald via Retrieved June 27, 2008. 
  11. ^ Semmens, Grady (June 26, 2008). "Asteroid-hunting satellite a world first" (Press release). Retrieved February 25, 2013. 
  12. ^ a b "NEOSSat (Near-Earth Object Surveillance Satellite)". European Space Agency. Retrieved October 20, 2014. 
  13. ^ Wallace, Brad; Scott, Robert; Sale, Michael; Hildebrand, Alan; Cardinal, Rob (2014). "The Near Earth Object Surveillance Satellite: Mission status and CCD evolution after 18 months on-orbit". 2014 Advanced Maui Optical and Space Surveillance Technologies Conference. Maui, Hawaii. September 9–12, 2014. 
  14. ^ a b William, Harvey; Morris, Tony (2008). "NEOSSat: A Collaborative Microsatellite Project for Space Based Object Detection". 22nd Annual AIAA/USU Conference on Small Satellites. Logan, Utah. August 11–14, 2008. Paper id SSC08-III-5. 
  15. ^ Carroll, Kieran A.; Hildebrand, Alan; Balam, David; Matthews, Jaymie (2000). "NESS: Using a Microsatellite to Search For and Track Satellites and Asteroids". 14th Annual AIAA/USU Conference on Small Satellites. Logan, Utah. August 21–24, 2000. Paper id SSC00-II-1. 
  16. ^ a b Wallace, Brad; Pinkney, Frank L.; Scott, Robert; Bédard, Donald; Rody, Jim et al. (2004). "The Near Earth Object Surveillance Satellite (NEOSSat)". Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education. Ottawa, Ontario. September 26–29, 2004. doi:10.1117/12.567077. 
  17. ^ Bédard, Donald; Spaans, Aaron (2007). "Responsive Space for the Canadian Forces". AIAA 5th Responsive Space Conference. Los Angeles, California. April 23–26, 2007. Paper id AIAA-RS-5-2007-3004. 
  18. ^ "Canadian Space Agency Departmental Performance Report 2011-2012 - Annexes". Canadian Space Agency. 2012. Retrieved July 9, 2013. 
  19. ^ a b c "Evaluation of the Near Earth Object Surveillance Satellite (NEOSSat) Project". Canadian Space Agency. February 2014. Project 13/14 02-02. Retrieved September 24, 2014. 
  20. ^ Clark, Stephen (February 23, 2013). "Canadian asteroid-hunting satellite to launch Monday". Spaceflight Now. Retrieved February 25, 2013. 
  21. ^ Kramer, Miriam (February 25, 2013). "Indian Rocket Launches Asteroid-Hunting Satellites, Tiny Space Telescopes". Retrieved February 25, 2013. 
  22. ^ Staff (February 25, 2013). "PSLV carrying Indo-French satellite 'SARAL' launched". Zee News. Retrieved February 25, 2013. 
  23. ^ Press, Jordan (July 6, 2014). "Asteroid-tracking satellite not up to the job: review". Ottawa Citizen. Retrieved September 24, 2014. 
  24. ^ Press, Jordan (July 27, 2014). "Satellite company blames Canadian Space Agency for some cost overruns". Ottawa Citizen. Retrieved September 24, 2014. 

External links[edit]