We are seeking a complete ADCS solution for a 3U CubeSat Earth-observation mission scheduled for launch in Q1 2027. The ADCS must provide attitude determination and control suitable for a 3U platform operating in a 550 km sun-synchronous orbit (approximately 97.5° inclination).

The system should include the required ADCS hardware, sensors, actuators, electronics, flight software, and associated accessories required for integration into the satellite. We are particularly interested in a ADCS solution compatible with our 3U satellite architecture and capable of supporting detumbling, three-axis attitude determination and control, nadir pointing, and attitude stabilization during payload operations. The ADCS must have a GNSS as well.

The required performance includes a pointing accuracy of better than 1° (3σ), attitude knowledge better than 0.07°, and adequate attitude stability for multispectral Earth-observation imaging. The system should support integration with our onboard computer, and provide the necessary electrical, mechanical, software, and communication interfaces.

Please provide a complete technical and commercial proposal, including the recommended configuration, system specifications, interface requirements, integration requirements, software and licensing details, delivery schedule, and any additional components required for a complete flight-ready ADCS.

Schedule is critical: the satellite assembly must be completed no later than 30 December 2026, with launch planned for Q1 2027. Suppliers should therefore clearly state the earliest achievable delivery date and total lead time, including manufacturing, testing, and any required integration support.

Summary:

Payload:
Multispectral imager (VNIR, usually 4 to 7 bands, e.g. Blue, Green, Red, Red Edge, NIR), CMOS push-broom or snapshot

Attitude determination (ADCS):
Sun sensors (coarse on each face, one fine sun sensor)
Magnetometer (3-axis)
Gyroscope / IMU (3-axis MEMS)
Star tracker (needed for decent pointing accuracy when imaging)
Earth sensor
Reaction wheels (pyramidal)
magnetorquers (3)

Rideshare launch and dispenser for one 6U CubeSat, about 12 kg, to SSO (500 to 600 km, flexible). Spacecraft ready early 2028; launch window flexible Q1 to Q2 2028.

Please include: price including dispenser and integration services; available missions and windows in Q1 to Q2 2028; booking terms (deposit, payment schedule, cancellation and rebooking); what booking documentation you can issue within 4 weeks of signing; dispenser model and heritage; launch vehicle heritage; integration campaign location and duration; policy on provider caused delays.
 

Narrowband IoT store and forward payload for a 6U satellite in SSO (500 to 600 km), 2 year design life.

Key requirement: the payload must receive uplinks from standard 3GPP NB-IoT devices (Release 17 NTN). Proprietary protocols are not acceptable. Proof of concept scale: tens of ground terminals in one region.

Please also quote: 5 to 10 compatible ground test terminals, and an engineering model as an optional line.

Please include: architecture (SDR hardware plus NTN software stack, and who supplies each); supported frequency bands including 3GPP NTN bands; mass, volume, power, interfaces and antenna solution; software licensing terms; TRL, and if NB-IoT NTN is new on your hardware, what has been demonstrated and where; regulatory filing inputs available (spectrum masks, EIRP, G/T); export classification and country of origin.

Multispectral imager for a 3 axis stabilized 6U satellite in SSO (500 to 600 km), 2 year design life. Please quote two options: Option A: the widest swath you offer in a 6U compatible package. Option B: your best GSD that fits a 1U to 1.5U envelope. Please also quote an engineering model as an optional line. Please include for each option: GSD and swath at 500 km; spectral bands; SNR and MTF; envelope with and without enclosure (checking fit against a 96 mm bay); mass, power, data interface, data rate and onboard storage; calibration data delivered and support for alignment and calibration testing; TRL; export classification and country of origin.