IKONOS Sensor — Student Presentation

Focused 9-slide deep-dive: launch, orbit, bands, product levels, WGS 84, applications.

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slide 1

IKONOS — GPY 370 Sensor Presentation

Title slide for a student sensor presentation focused on IKONOS.

Likely answer edit

Deck scope. A focused 9-slide walkthrough of IKONOS — the first US commercial sub-meter satellite. Covers history, orbit, bands, products, reference system, and applications. Duplicates some of what’s in the Sensors deck but goes deeper on the history and data-product side.
slide 2

Overview of the system

  • First U.S. commercial high-resolution satellite.
  • Successfully launched September 24, 1999 from Vandenberg Air Force Base, California.
  • Operated by DigitalGlobe (originally Space Imaging). Each international affiliate operated its own ground station.
  • Overall objective: offer commercial high-resolution imagery with excellent location knowledge in near real-time and offline.
Likely answer edit

IKONOS — quick history.

  • First U.S. commercial high-resolution satellite.
  • Launched: Sept 24, 1999 from Vandenberg Air Force Base, California.
  • Operated by Space Imaging initially — later by DigitalGlobe after consolidation (note the slide lists DigitalGlobe because of that later ownership).
  • International affiliates operated their own ground stations, giving regional distributors direct access.
  • Objective: deliver commercial high-resolution imagery with precise geolocation, both near-real-time and offline.
  • Retired: March 31, 2015 (not mentioned on the slide but important context).
slide 3 (picture)

First IKONOS image — Washington, D.C.

First IKONOS image, Washington D.C.
In-image text (for later study-guide use)

Left: artist rendering of the IKONOS spacecraft over Earth. Right: the first IKONOS image taken of Washington D.C. — a sub-meter panchromatic view of the Mall and the Potomac. Source: fas.org.

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The first IKONOS image — Washington D.C.

  • Captured shortly after launch in late 1999.
  • Demonstrated the sub-meter capability that had been restricted to defense imagery until then — a turning point for civilian Earth observation.
  • Source: fas.org (Federation of American Scientists archive).
slide 4

Orbit characteristics

ElementValue
Altitude423 miles / 681 km
Orbital period98 minutes → 14.6 revolutions/day
Inclination98.1° (near-polar, sun-synchronous)
Swath width11 km
ScannerLinear-array pushbroom
Likely answer edit

IKONOS orbit — the four numbers to memorize.

Parameter Value
Altitude 681 km (423 mi)
Orbital period 98 min → 14.6 revolutions/day
Inclination 98.1° (sun-synchronous, near-polar)
Swath width 11 km at nadir
Scanner type Pushbroom (linear array)
  • “98.1°” is a near-polar sun-synchronous orbit — crosses the equator at the same local time (~10:30 AM descending) each day.
slide 5

Key parameters — bands & resolution

  • Four multispectral bands at 4 m + a panchromatic band at 1 m.
  • Pan-sharpening fuses the 4 m MS onto the 1 m pan for an effective 1 m color product.
BandWavelength (µm)Resolution
Pan0.45 – 0.901 m
1 — Blue0.45 – 0.524 m
2 — Green0.52 – 0.604 m
3 — Red0.63 – 0.694 m
4 — NIR0.76 – 0.904 m
  • Radiometric resolution: 11-bit sensitivity → 2 048 grey levels. Delivered as unsigned 16-bit data.
  • Temporal resolution: ~3 days at mid-latitudes via off-nadir pointing.
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IKONOS key parameters — bands and radiometry.

Band Wavelength (µm) Resolution
Panchromatic 0.45 – 0.90 1 m
1 — Blue 0.45 – 0.52 4 m
2 — Green 0.52 – 0.60 4 m
3 — Red 0.63 – 0.69 4 m
4 — NIR 0.76 – 0.90 4 m
  • Pan-sharpening: the 4 m MS can be fused with the 1 m pan to yield an effective 1 m color image.
  • Radiometric resolution: 11-bit sensitivity → 2 048 grey levels. Delivered in 16-bit unsigned data format (the extra 5 bits are zero-padded).
  • Temporal resolution: ~3 days revisit at mid-latitudes via ±45° off-nadir pointing.
slide 6 (picture)

Data and products

  • Imagery provided in six levels: Geo, Standard Ortho, Reference, Pro, Precision, PrecisionPlus.
  • Commercial data purchased by square kilometer — you only pay for the exact AOI, not a fixed scene.
IKONOS geographic coverage map
In-image text (for later study-guide use)

World map labeled Geographic Coverage with pink shading over land masses — indicates IKONOS imagery was collectable globally (on demand, not continuously archived).

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IKONOS data products — six levels of correction.

Level What’s corrected
Geo Basic geolocation using sensor ephemeris
Standard Ortho Orthorectified using a coarse DEM
Reference Tighter orthorectification, GCPs
Pro Professional-grade orthorectification
Precision High-accuracy GCPs + detailed DEM
PrecisionPlus Highest accuracy product in the catalog
  • Pricing model: purchased by square kilometer — you pay only for the exact area of interest, not for a fixed scene footprint.
  • Imagery coverage was global but tasked on-demand (not a continuous archive like Landsat).
slide 7

Image reference system — WGS 84

  • World Geodetic System 1984 — the global coordinate/datum standard.
  • Defined with respect to globally-distributed station locations.
  • Helpful for global survey — consistent coordinates everywhere.
  • Reference surface: spheroidal reference ellipsoid (WGS 84 ellipsoid).
  • Coordinate origin: Earth's center of mass — accurate to within ~2 cm.

Reference: Wikipedia — World Geodetic System

Likely answer edit

Image reference system — WGS 84.

  • World Geodetic System 1984 is the global coordinate/datum standard.
  • Defined relative to a set of globally-distributed ground stations.
  • Reference surface: a spheroidal reference ellipsoid (the WGS 84 ellipsoid).
  • Origin: the Earth’s center of mass, accurate to within about 2 cm.
  • Used by GPS/GNSS and nearly all modern remote-sensing products — including all Landsat and Sentinel Level-1/Level-2 products.
slide 8

Data applications

Urban & rural

  • Mapping natural resources and natural disasters
  • Agriculture and forestry analysis
  • Mining, engineering, construction, change detection

Military & Homeland Security

  • Department of Defense imagery
  • Intelligence, reconnaissance, disaster response
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IKONOS applications.

  • Urban & rural:
    • Mapping natural resources and natural disasters.
    • Agriculture and forestry analysis.
    • Mining, engineering, construction, and change detection.
  • Military & Homeland Security:
    • Department of Defense use (dual-use imagery).
    • Intelligence, reconnaissance, disaster response.
  • Strength pattern: wherever you need sub-meter detail over a small AOI with quick tasking (flood extent, battle damage, illegal logging, infrastructure inventory).
slide 9

Future use

Continued use for case-by-case natural-disaster response and land surveillance — though IKONOS itself was retired March 31, 2015, the on-demand sub-meter tasking model it pioneered lives on in WorldView, GeoEye, Pleiades, and SkySat.

Likely answer edit

Future use (written when the deck was made).

  • IKONOS was retired in March 2015, but the framing on the slide — “case-by-case natural disasters and land surveillance” — describes the commercial sub-meter tasking model that lives on through its successors:
    • WorldView-1/2/3/4 (DigitalGlobe / Maxar).
    • GeoEye-1 (same operator).
    • Pleiades 1A/1B (Airbus).
    • SkySat (Planet) for 0.5 m daily revisits.
  • The “launch one, task it on demand, sell imagery by square km” business model that IKONOS pioneered is now an industry.

Deck: IKONOS_Sensor.pptx — 9 slides. Download original · Edit our reproduction