INTELSAT 36 (IS-36)

Intelsat 36 (IS-36) is a commercial geostationary communications satellite operated by Intelsat, one of the world's largest fixed satellite service providers. Launched on August 23, 2016, the spacecraft occupies a coveted orbital slot above the equator and delivers telecommunications and media distribution services to two geographically distinct but commercially significant regions: Sub-Saharan Africa and South Asia. Catalogued by the United States Space Surveillance Network under NORAD ID 41747 and carrying the international designator 2016-053A, IS-36 represents a standard commercial deployment of the kind that has formed the backbone of global satellite broadcasting infrastructure since the late twentieth century.

Mission and Purpose

The primary function of Intelsat 36 is to provide broadcast and media distribution capacity across Sub-Saharan Africa and South Asia. These two regions, while separated by thousands of kilometers, share certain connectivity challenges rooted in varied terrain, large rural populations, and uneven terrestrial infrastructure. Geostationary satellites address such challenges by offering wide-area coverage from a fixed orbital position, making them particularly well suited for broadcasting video content to large numbers of receivers simultaneously.

A distinguishing commercial feature of IS-36 is its role as a direct service provider to MultiChoice, the South African pay-television and media company. MultiChoice operates the DStv satellite television platform, which is one of the dominant broadcast services across the African continent. By securing anchor customer status with MultiChoice, IS-36 was positioned from the outset as a high-capacity media distribution platform rather than a general-purpose telecommunications relay.

The satellite employs a mixed payload combining C-band and Ku-band transponders. This dual-band configuration is a deliberate design choice: C-band signals are more resistant to rain fade and atmospheric interference, making them reliable for broad regional coverage even in tropical climates with heavy seasonal rainfall, while Ku-band offers higher power density suitable for direct-to-home broadcasting and smaller receive terminals. Together, the two frequency bands allow the satellite to serve a range of applications — from large earth station uplinks to compact consumer dishes — across the African and South Asian footprints it serves.

The orbital position of 68.5° East longitude was selected to provide favorable geometry over both coverage regions simultaneously. From that equatorial longitude, a single satellite can maintain continuous line-of-sight contact with ground stations and user terminals spread across the Indian Ocean region, from the eastern coast of Africa well into the Indian subcontinent.

Orbit and Tracking

IS-36 operates in a geostationary orbit, a specialized circular orbit at approximately 35,786 kilometers above the equator where a satellite's orbital period matches Earth's rotation period. This synchronization causes the satellite to appear stationary relative to any fixed point on the ground — a property that is fundamental to its broadcasting mission, since dish antennas at subscriber homes and broadcast uplink stations do not need to track a moving target.

Current tracking data confirm that IS-36 maintains an orbit consistent with geostationary expectations. The satellite's apogee stands at 35,802 km and its perigee at 35,788 km, a difference of only 14 km that reflects a nearly circular orbit with minimal eccentricity. Its inclination is recorded at 0.0°, confirming that the orbital plane lies essentially within the equatorial plane — another defining characteristic of true geostationary operation. The orbital period is 1,436.2 minutes, which corresponds closely to one sidereal day, the time Earth takes to complete one full rotation relative to the stars.

For satellite tracking purposes, IS-36 is not a visually dynamic object in the way that low-Earth orbit satellites are. Geostationary satellites do not appear to move across the sky; instead, they remain fixed at a single azimuth and elevation for any given ground location. This means IS-36 is of limited interest for naked-eye or casual binocular observation compared to objects in lower orbits. However, it is continuously tracked by the Space Surveillance Network and its orbital elements are regularly published, allowing ground station operators and researchers to monitor its station-keeping behavior over time.

As of the most recent data, the spacecraft remains in orbit and has not undergone any decay or controlled reentry. Its near-circular, equatorial orbit at geostationary altitude is inherently stable over long timescales and requires only periodic station-keeping thruster firings to maintain the assigned longitude slot against the perturbing forces of solar radiation pressure, lunar and solar gravity, and Earth's non-uniform gravitational field.

Design and Operator

Intelsat 36 was built on the SSL 1300 satellite bus, manufactured by Space Systems/Loral (SSL), a California-based spacecraft manufacturer that produced some of the most widely flown commercial satellite platforms of the late twentieth and early twenty-first centuries. The SSL 1300 is a modular, high-power bus that has been used for dozens of commercial geostationary satellites and is known for its flexibility in accommodating a range of payload configurations, including mixed-band transponder suites such as the C- and Ku-band combination aboard IS-36.

Intelsat, the satellite's operator, is a Luxembourg-headquartered company with a long institutional history. It traces its origins to the International Telecommunications Satellite Organization, an intergovernmental consortium established in the 1960s to provide global satellite communications. Following privatization in 2001, Intelsat became a commercial operator with one of the largest fleets of communications satellites in the world. The company has historically served broadcasters, telecom carriers, government users, and internet service providers across multiple orbital arcs.

The specific mass and detailed power specifications of IS-36 are not recorded in the public satellite catalog entries available for this object. The SSL 1300 bus is capable of accommodating a wide range of spacecraft configurations, and without confirmed manufacturer disclosures, specific figures for IS-36's on-orbit mass or payload power cannot be stated with authority.

IS-36 was launched on August 23, 2016. The launch took place at 20:00 Eastern Daylight Time, placing the event on a Tuesday evening from the Eastern United States perspective. The launch vehicle and launch site details are not enumerated in the verified catalog data for this object, though commercial SSL 1300 satellites of this era were frequently launched aboard Ariane 5 or other heavy-lift vehicles serving the geostationary transfer market.

Coverage and Regional Significance

The geographic scope of IS-36's service footprint encompasses two demographically substantial and rapidly evolving regions in terms of satellite broadcasting demand. Sub-Saharan Africa has seen sustained growth in pay-television penetration over the past two decades, driven in part by expanding urban middle classes, improvements in consumer electronics affordability, and the expansion of DStv and similar services into markets previously underserved by broadcasting infrastructure. IS-36 directly supports this trend by providing orbital capacity dedicated to the region.

South Asia similarly presents a large and growing market for satellite-delivered content. High population density, a diverse multilingual media landscape, and geographic conditions that complicate terrestrial distribution have historically made satellite broadcasting an attractive solution for reaching both urban and rural audiences. IS-36's footprint over the Indian subcontinent positions Intelsat to serve broadcasters, direct-to-home operators, and institutional customers in that market.

The positioning of IS-36 at 68.5° East also places it in proximity to other Intelsat and third-party satellites in the arc above the Indian Ocean region, an increasingly congested portion of the geostationary belt that reflects the commercial importance of the markets it serves. Orbital slot assignments at this longitude are coordinated internationally through the International Telecommunication Union's radiocommunication sector, and maintaining a presence there represents a significant commercial and regulatory asset for Intelsat.

Current Status

IS-36 remains in orbit as of the current catalog record, with no decay or reentry event on file. Its orbital parameters indicate continued station-keeping at or near its assigned geostationary position, consistent with an operational or at minimum a preserved spacecraft. The mission status is not formally recorded in the public catalog data for this object, meaning it is not possible to confirm from tracking records alone whether the satellite is actively serving its full intended payload capacity, operating in a reduced capacity, or in a standby configuration.

Geostationary communications satellites of the SSL 1300 generation are typically designed for service lifetimes in the range of fifteen or more years, depending on onboard fuel reserves and component performance. IS-36 was launched in 2016, meaning it would be within a normal operational lifespan as of the mid-2020s. The continuity of its orbital data in the Space Surveillance Network catalog, combined with the absence of any reentry event, is consistent with an ongoing on-orbit presence whether or not all details of its current operational status are publicly documented.