Optical Remote Sensing Series

DFHSat developed the mode of the public platform and productization. We form CAST1000, CAST2000, and CAST3000 platforms and production systems suitable for small satellite development. The different platform strongly supports the demand for the intensive launch of satellites.


? CAST 1000 Platform

The CAST1000 platform is a 100-500kg public satellite suitable for light remote sensing and technique validation. It adopts zero momentum attitude control, a high ratio power supply system, highly integrated electronics, and miniaturized components. It is developed for high-resolution (HR) payloads and also could suit very high-resolution (VHR) payloads.

The platform is customed by users' needs, such as agile capability and high precision requirements.


? CAST 2000 Platform

The CAST2000 platform is a 400-900kg satellite public platform suitable for long life, high reliability, and medium and high resolution remote sensing applications.

It realized the three-axis stability control mode of zero momentum or biased momentum and has the ability of high-accuracy control, large-scale attitude maneuvering ability, flexible orbit control ability, and highly self-control ability. The platform has multi and weighted payload adaptability.


? CAST 3000 Platform

The CAST3000 platform is an 800-1500kg satellite public platform for very high-resolution (VHR) optical imaging with determination accuracy, high stability, and high agility.

It is development providing very high performance and high-quality products. Its advantages include agile ability, high-quality images, and a high bearing ratio. Based on mission requirements, The remote sensing satellite developed for the CAST3000 platform have a broad range of usages like environmental management, disaster monitoring, etc.


? The ZY1000 platform

The ZY1000 platform is a general development platform designed for small and medium-sized remote sensing satellites in the low earth orbit ranging from 250 km to 1500 km. The platform weights 800 to 1200 kg (excluding the propellant) and adopts a modular design strategy for flexible configuration. With fully-regulated bus type power supply, three-axis attitude stability control, monopropellant thrust system, and standardized electronic and mechatronic standalone products, the ZY1000 platform satisfies the demand of various remote sensing satellite missions with optical or microwave payloads. It also has the ability of self-organized mission planning and health management.

Specifications

Satellite Weight

2500kg

Payload Weight

1000kg

Payload Power

800~2000W,short-term peak up to 12000W

Payload Type

optical, microwave, and other

Attitude Control Ability

Measurement Accuracy:<0.001°(3σ)

Pointing Accuracy:<0.01°(3σ)

Stability:<1×10-4°/s(3σ)

Swing Ability:±32°/400s(rolling)

Data Transmission

Earth-oriented or relay

Measurement and Control

Uplink: 8000bps

Downlink: 16384bps

Navigation and Positioning

GPS and BeiDou

Orbit Determination Accuracy: less than 3m

Carrier

CZ-11, CZ-6, CZ-2C/D, CZ-4B/C

Design Life

8 years



? The ZY2000 platform

The ZY2000 platform is a high-performance general platform designed for high agility remote sensing satellites with optical or microwave payloads in the low earth orbit ranging from 250 km to 1500 km. It adopts a modular design strategy for flexible configuration.

The ZY2000 platform has the advantage of high stiffness, small inertia, and high output torque. With fully-regulated bus type power supply, three-axis attitude stability control, monopropellant thrust system, and standardized electronic and mechatronic standalone products, the ZY2000 platform achieves both high attitude stability and excellent attitude agility, satisfying the working requirements for diverse complex payloads.

Specifications

Satellite Weight

2000~3500kg

Payload Weight

800~1500kg

Payload Power

800~3000W, short-term peak up to 12000W

Payload Type

optical, microwave, and other

Attitude Control Ability

Measurement Accuracy:≤0.001°(3σ)

Pointing Accuracy:≤0.01°(3σ)

Stability:≤0.0005°/s(3σ)

Attitude Maneuvering Ability

25°/15s

Data Transmission

Earth-oriented or relay

Measurement and Control

Uplink: 8000bps

Downlink: 16384bps

Navigation and Positioning

GPS and BeiDou

Orbit Determination Accuracy: less than 3m

Carrier

CZ-4B/C, CZ-6A etc.

Design Life

8 years



? The ZY3000 platform

The ZY3000 platform is a high-performance general platform designed for medium-sized remote sensing satellites. It adopts a modular design strategy for flexible configuration and is applicable in remote sensing satellite missions with optical or microwave payloads in low, medium, or high orbits.

The ZY3000 platform has the advantage of large carrying capacity, excellent attitude stability and pointing accuracy, long design life. Depending on the mission requirements, the platform is able to switch between the fully-regulated bus type power supply and the fully/un-regulated composite bus type power supply. It also offers the choice between monopropellant thrust system and bipropellant thrust system. With standardized electronic and mechatronic standalone products, the ZY3000 platform has a maximum carrying capacity of 7000kg, a maximum power capability of 20kW, and a design life of 15 years.

Specifications

Satellite Weight

3500kg~7000kg

Payload Weight

500~3000kg

Payload Power

3500W(expandable to 17400W)

Payload Type

optical, microwave, and other

Attitude Control Ability

Pointing Accuracy:≤0.001°(3σ)

Three-Axis Pointing Accuracy:≤0.01°(3σ)

Pointing Stability:≤0.0001°/s(3σ)

Attitude Maneuvering Ability

25°/30s(Typical Configuration)

Data Transmission

Earth-oriented or relay

Measurement and Control

LEO:Uplink 8000bps, Downlink 16kbps

HEO:Uplink 64000bps, Downlink 64kbps

Navigation and Positioning

GPS and BeiDou,

Orbit Determination Accuracy:

less than 3m(LEO)/30m(HEO)

Carrier

CZ-3B/3C, CZ-4B/4C, CZ-6A, CZ-7A etc.

Design Life

LEO: 8 years

HEO: 12~15 years