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Bill Schweber

The Iridium global satcom system, Part 5: Advances and competition

November 6, 2020 By Bill Schweber Leave a Comment

This worldwide satellite-based communications system went from dream to reality in a decade but quickly failed in the market; its revival took persistence and luck, plus a new customer base. Of course, there were also significant technological advances required in many areas, including designing and building longer-life electronics despite the unavoidable effects of space radiation […]

Filed Under: Aerospace and Defense, Applications, FAQ, Featured, Telecommunications, Wireless Tagged With: FAQ

The Iridium global satcom system, Part 4: Lessons learned

November 6, 2020 By Bill Schweber Leave a Comment

This worldwide satellite-based communications system went from dream to reality in a decade but quickly failed in the market; its revival took persistence and luck, plus a new customer base. Today, Iridium is a viable mobile, satellite-based, which handles voice and data.  As with standard cellular systems, its users have little or no idea of […]

Filed Under: FAQ, Featured Tagged With: FAQ

The Iridium global satcom system, Part 3: Very nearly crash and burn

November 5, 2020 By Bill Schweber Leave a Comment

iridium

This worldwide satellite-based communications system went from dream to reality in a decade but quickly failed in the market; its revival took persistence and luck, plus a new customer base. Iridium’s launch, crash, and nearly burn (literally) The Iridium communications service was initiated on November 1, 1998, with a call by then-Vice President Al Gore. […]

Filed Under: Aerospace and Defense, Applications, FAQ, Featured, Telecommunications, Wireless Tagged With: FAQ

The Iridium global satcom system, Part 2: The implementation

November 4, 2020 By Bill Schweber Leave a Comment

iridium

This worldwide satellite-based communications system went from dream to reality in a decade but quickly failed in the market; its revival took persistence and luck, plus a new customer base. The first part of the article explained the inspiration and rationale for the Iridium system. Three major elements were required to make the Iridium concept […]

Filed Under: Aerospace and Defense, Applications, FAQ, Featured, Telecommunications, Wireless Tagged With: FAQ

Iridium global satcom system: Brilliant design, terrible business, last-minute reprieve, Part 1

November 3, 2020 By Bill Schweber Leave a Comment

This worldwide satellite-based communications system went from dream to reality in a decade but quickly failed in the market; its revival took persistence and luck, plus a new customer base. Business failures of companies with grand schemes and grandiose plans are part of the realities of technology-driven visionaries. Sometimes, however, the project is so large […]

Filed Under: Aerospace and Defense, Applications, FAQ, Featured, Telecommunications, Wearables Tagged With: FAQ

LIDAR and Time of Flight, Part 4: Circuitry and advances

December 13, 2019 By Bill Schweber Leave a Comment

LIDAR and Time of Flight

LIDAR systems and ToF techniques are critical to providing self-driving cars with a detailed picture of the surrounding and is used in many research applications as well. This is the final part of a four-part series on LIDAR systems and ToF techniques. The high-level block diagram of a LIDAR system inherently glosses over the many […]

Filed Under: Applications, Automotive, Connectivity, FAQ, Featured, Wireless Tagged With: FAQ, texainstrumentsinc

LIDAR and Time of Flight, Part 3: Emitters, sensors, and scanners

December 13, 2019 By Bill Schweber Leave a Comment

LIDAR and Time of Flight

LIDAR systems and ToF techniques are critical to providing self-driving cars with a detailed picture of the surrounding and is used in many research applications as well. This is part three of a four-part series on LIDAR systems and ToF techniques.  At the front end of a LIDAR system is the photon emitter and its […]

Filed Under: Applications, Automotive, Connectivity, FAQ, Featured, Wireless Tagged With: FAQ, firstsensorag, lasercomponentsusainc, texasinstrumentsinc

LIDAR and Time of Flight, Part 2: Operation

December 13, 2019 By Bill Schweber Leave a Comment

 LIDAR systems and ToF techniques are critical to providing self-driving cars with a detailed picture of the surrounding and is used in many research applications as well. This is part two of a four-part series on LIDAR systems and ToF techniques.  Just as for radar and sonar, the LIDAR concept is simple but the execution […]

Filed Under: Applications, Automotive, FAQ, Featured, Wireless Tagged With: FAQ, terabee

LIDAR and Time of Flight, Part 1: Introduction

December 12, 2019 By Bill Schweber Leave a Comment

LIDAR and Time of Flight

LIDAR systems and ToF techniques are critical to providing self-driving cars with a detailed picture of the surrounding and is used in many research applications as well. Many of the major automobile vendors, along with well-known non-auto companies such as Google, are devoting major resources to developing autonomous vehicles (often called “self-driving cars”). These vehicles […]

Filed Under: Applications, Automotive, FAQ, Featured, Wireless Tagged With: ams, FAQ, hammamatsuphotonics, texasinstrumentsinc

Inertial Measurement Units: The hidden key to Apollo success, now a MEMS device (Part 2)

July 17, 2019 By Bill Schweber Leave a Comment

Inertial Measurement Unit

Part 1 of this article looked at the classic, highly refined, mature gyroscope-based IMU used for the Apollo moon mission; this part looks at the very different technologies which have largely replaced it. Gyro-based IMU: obsolete, or not? Inertial navigation relies on a stable platform with an orientation which is fixed in space and maintains […]

Filed Under: Aerospace and Defense, Applications, FAQ, Featured Tagged With: analogdevicesinc, FAQ

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