Table 2.
Detailed analysis of requirements.
| Lab-payload requirements | Comment | |
|---|---|---|
| LEO | Lab—payload remains functional during the satellite’s exposure to particle radiation and protects the biological object from its influence | The value of the accumulated radiation dose depends, among others, on the time and orbit parameters and the method of implementing the construction of the lab—payload and satellite platform |
| Lab—payload remains functional when the satellite is exposed to variable heat fluxes | Operating temperature range for the satellite’s internal components: from − 40 °C to + 50 °C29 | |
| Lab—payload remains functional during the vacuum exposure | The range of changes from 10–6 to 10–4 Pa30 | |
| Lab—payload remains functional in microgravity conditions | The range of changes from 10–6 to 10–3 m/s230 | |
| ROCKET | Materials used for the construction of the lab-payload (especially the outer casing and mounting elements) are characterized by very low gassing coefficients in vacuum |
Total Mass Loss (TML) ≤ 1.0% Collected Volatile Condensable Material (CVCM) ≤ 0.1% According to 3.1.8.1 and 3.1.8.232 |
| Materials used for the construction of the lab—payload were not included in the list of hazardous materials | According to the Table 49 CFR §172.1033 | |
| Lab—payload fulfill electromagnetic compatibility requirements | Verification required according to launch service provider specifications | |
| Lab—payload remains functional after lunch acceleration | Verification required in random vibration test, according to launch service provider specifications | |
| Lab—payload remains functional after the satellite is exposed to the thermal conditions of rocket launch | Verification in a thermal-vacuum test, according to launch service provider specifications | |
| Biological experiment is adjusted to “wait” time for launch in orbit (pause/off mode) | Shutting down a CubeSat takes about 3–5 months, a biological experiment may be suspended even longer due to the need to carry out the process of assembly, integration, and testing of the device | |
| CUBESAT |
Nanosatellite volume – 3U Lab—payload volume ≈ 2U |
On the selected 3U satellite platform (SatRev) ≤ 96 mm × 96 mm × 190 mm including mounting elements |
| Lab—payload weight ≈ 2.66 kg | Accordance with 3.2.1330 taking into account that the center of gravity of the CubeSat should be ≤ 20 mm from its geometric center in the X and Y directions (3.2.1431) | |
| Materials used for the construction of the lab-payload (especially the packaging and mounting elements) do not have ferromagnetic properties | Elimination of a potential source of disturbances in the operation of other satellite modules | |
| Maximum current consumed by the lab-payload: 3 A | According to the specifications of the universal satellite platform from SatRev: Interface Control Document rev 2.3 | |
| Available voltages for lab-payload operation: 3.3 V, 5 V, 12 V | ||
| Constant power consumption of lab-payload at 5 V: max. 15 W | ||
| Lab-payload has its own electronic module for managing the experiment and recording experiment data | The On-Board Computer (OBC) module is an on-board computer only for satellite platform modules | |
| Exchange of lab-payload data with platform modules using the CAN bus | Transport and network layer defined by CSP (CubeSat Space Protocol) | |
| Transmission of lab-payload data packets at a speed of ≤ 550 kb/s | Direct addressing to the satellite radio module | |
| LAB-PAY LOAD | Lab-payload maintains the culture gas mixture | The composition of the culturing gas mixture depends on the biological object |
| Lab-payload maintains the appropriate temperature of biological samples and culture medium | Plus temperatures, the exact value/range varies depending on the biological object | |
| Lab-payload ensures the flow of culture medium | Range from µl/min to ml/min, exact values depend on the method of implementing the biological sample carrier and the microfluidic system as well as the biological object being tested | |
| Lab-payload provides the measurement of the humidity of the indoor atmosphere | Humidity is important for traditional culturing; the range required varies depending on the biological object | |
| Lab-payload protects against cosmic radiation | Lab-payload is intended to enable the assessment of the impact of microgravity on a biological object | |
| Lab—payload ensures the detection of the biological sample and the progress of the experiment | Required non-invasive method that does not affect the condition of the biological object or the progress of the experiment |