The FCC resolution establishes deadlines: at least 50% of the Gen2 satellites must be operational by December 1, 2028.

The remaining Gen2 satellites have a deadline of December 2031 for operation.

The Federal Communications Commission (FCC) of the United States has authorized SpaceX to launch 7,500 additional second-generation Starlink satellites.

This timeline supports SpaceX's mid-term global expansion efforts.

SpaceX has adjusted orbits this year to reduce the likelihood of collisions.

The FCC's approval includes exceptions to previous requirements that limited coverage overlap and capacity expansion.

The decision will increase SpaceX's total constellation to around 15,000 satellites in orbit.

SpaceX requested authorization for 30,000 satellites, but the FCC approved only half of that number.

Astronomers and space traffic specialists have raised concerns about increased light pollution, collision risks, and orbital debris accumulation due to the new satellite launches.

The FCC later authorized Gen2 operations using additional frequencies in the E- and V-bands.

SpaceX can operate in the mobile satellite services (MSS) spectrum as well as fixed satellite services (FSS) under certain frequencies.

The FCC is reviewing spectrum sharing and satellite power limits.

SpaceX filed for Gen2 modifications in late 2024 to enable gigabit-speed service.

The FCC authorized SpaceX to deliver 15,000 new and advanced satellites.

Viasat and EchoStar filed objections to SpaceX's EPFD waiver.

FCC Chairman Brendan Carr stated that this authorization is a game-changer for next-generation services.

The FCC's approval allows SpaceX to operate Starlink in more frequencies and waives satellite power limits inside the United States.

The order allows SpaceX to upgrade all Gen2 Starlink satellites to operate using Ku-, Ka-, V-, and W-band frequencies.

The FCC's approval order states the Space Bureau will revoke the EPFD waiver in the event of unresolved harmful interference.

The FCC authorized SpaceX to deploy 7,500 more Gen2 Starlink satellites on January 9.

The EPFD limits facilitate spectrum sharing by Geostationary Orbit (GEO) and Non-Geostationary Orbit (NGSO) operators.

The FCC previously partially approved SpaceX to deploy a Gen2 Starlink constellation in 2022.

The order allows SpaceX to add new orbital shells at altitudes ranging from 340 km to 485 km to optimize coverage and performance.

The approval also permits direct-to-cell connectivity outside the United States and supplemental coverage within the U.S.

The FCC granted SpaceX a waiver for equivalent power flux density (EPFD) limits for operations inside the United States.

The FCC believes granting SpaceX's waiver is in the public interest while the rulemaking is ongoing.

Infrared sounders and imagers on satellites such as GOES and JPSS detect emitted thermal radiation to map temperature gradients.

As of early 2026, the study of isotherms has become more important due to the deployment of Direct-to-Device and High Throughput Satellite networks.

The term 'isothermal' in satellite manufacturing refers to a design philosophy maintaining nearly uniform temperature across the entire satellite structure.

The term isotherm refers to a line on a map or chart that connects points of equal temperature.

The 0°C Isotherm Height, or freezing level, is a significant metric for satellite operators.

Atmospheric scientists are monitoring localized thermal impacts and resulting isotherm shifts due to sunlight-reflecting satellites being tested by startups like Reflect Orbital in 2026.

Small satellites are highly power-dense and have limited surface area for radiators, making it necessary to strive for an isothermal state.

Real-time data on atmospheric isotherms is increasingly required for dynamic power allocation and gateway switching in modern ground segments.

Thermal engineers work to prevent overheating of sensitive electronic components and ensure batteries in small satellites remain above freezing.

Isotherms are used in atmospheric remote sensing for weather prediction and in thermal engineering of spacecraft.

Krupal Patel is the senior director of National Security Space Business Development for Lanteris Space Systems.

The Golden Dome planned missile defense architecture was announced in 2025.

Nations are increasing space investment to secure sovereign communications and access to space-based intelligence, surveillance, and reconnaissance data.

Lanteris Space Systems and BlackSky participated in a webinar discussing space and defense trends for 2026.

Space-based capabilities are critical for national defense strategies.

The webinar featuring Lanteris and BlackSky was sponsored by these two companies.

Scot Currie is the vice president of Geospatial Solutions for BlackSky.

Defense demand for commercial space systems has been a key trend in 2025 affecting satellite communications, manufacturing, and imagery and sensing.

On the West Antarctic Ice Sheet, ice flow at the grounding line of Pine Island Glacier increased from roughly 10.6 meters per day to 12.7 meters per day during the study period.

Rapid outlet flows around Greenland generally reach up to about 15 meters per day, discharging ice from the interior to the ocean.

Sentinel 1's systematic polar acquisition strategy maintains continuous coverage over Greenland and Antarctic ice sheets.

Since the launch of its first satellite in 2014, Sentinel 1 has significantly expanded polar Earth observation capabilities using a 12 meter long C band SAR instrument.

The study team developed algorithms to produce detailed maps and dense time series of glacier and ice sheet velocity spanning more than a decade.

The new dataset is derived from advanced processing of synthetic aperture radar data from Sentinel 1 and marks the mission's first decade.