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VIS-NIR Coating — SĀCHI
ZeCoat coated the visible to near-infrared mirrors for SĀCHI (Situational Awareness Camera Hosted Instrument). SĀCHI is a US–Japan partnership in which the United States provides space domain awareness (SDA) sensors to be hosted on board Japanese satellites as part of the Quasi-Zenith Satellite System (QZSS).
- Flight Heritage: Flying on Japan’s Quasi-Zenith Satellite System (QZSS) navigation satellites
Related Links
Reflectance by Band
| Band | Avg. Reflectance | Min Reflectance |
|---|---|---|
| 420-450 nm | 89% | 67% |
| 450-500 nm | 98% | 97% |
| 500-550 nm | 99% | 98% |
| 550-600 nm | 97% | 96% |
| 600-650 nm | 95% | 94% |
| 650-700 nm | 96% | 95% |
| 700-750 nm | 97% | 97% |
| 750-800 nm | 97% | 97% |
| 800-850 nm | 97% | 96% |
| 850-900 nm | 96% | 95% |
| 900-950 nm | 94% | 93% |
| 950-1000 nm | 93% | 93% |
| 1000-1100 nm | 94% | 93% |
| 1100-1500 nm | 98% | 96% |
* Scans shown are for an 8° angle of incidence (AOI). This coating has been approved for angles up to 55° AOI.
Environmental Durability
| Test | Specification | Description |
|---|---|---|
| Adhesion | MIL-PRF-13830B, B.4.4.6 | Slow-pull, 90-deg |
| Abrasion | MIL-PRF-13830B, B.4.4.5 | Moderate cheesecloth, 50 strokes |
| 24-hr Humidity | MIL-PRF-13830B B.4.4.7 | 50C/95%/24-hr |
| Thermal Cycle | MIL-PRF-13830B B.4.4.4 | +75 C / -60 C |
| Cleanability | IEST-STD-CCR46 |