# INSPIRE-SAT 7, a Second CubeSat to Measure the Earth's Energy Budget and to Probe the Ionosphere
## 5 Conclusions  
INSPIRE-SAT7 is a scientific and in-orbit technological demonstration satellite in the domain of Earth Observation (ERB and ionospheric measurements) and Solar Physics (total and solar spectral irradiance), scheduled to be launched in 2023. INSPIRE-SAT7 uses disruptive technologies for remote sensing and will improve the miniaturization and compactness of small sensors onboard small satellites. The results obtained with UVSQ-SAT are encouraging. They pave the way for the future INSPIRE-SAT7 mission, which will have to work in concert with the UVSQ-SAT mission. We show how two CubeSats in orbit could improve the ERB measurements. With INSPIRE-SAT7, we hope to improve the absolute accuracy (\(\pm\)5.00 Wm\({}^{-2}\) for OLR and OSR), the stability per year (\(\pm\)1.00 Wm\({}^{-2}\) for OLR and OSR), and the temporal resolution (10 days with 2 CubeSats in-orbit). About spatial resolution, it is not possible to obtain improvements with only 2 CubeSats in low Earth orbit using sensors with a wide field of view. It would be necessary to have sensors with fields of view of at most 10\({}^{\circ}\) to obtain a spatial resolution close to 100 km. Our analysis shows the interest of developing a constellation of at least 32 satellites evolving in multiple orbital path with sensors using narrow and wide field of view to respect the Terra-F requirements (temporal and spatial resolutions). Finally, the INSPIRE-SAT7 tools are used in our education program to train students in space technology, Earth observations, and Astronomy & Astrophysics. INSPIRE-SAT7 is part of the INSPIRE program, which is an international consortium of Universities collaborating in science and small satellites development. Conceptualization (D.B., C.B. ([PERSON])), LATMOS (M.M., P.K., A.S., T.B., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), C.D. ([PERSON]), A.F., A.-J.V., E.B., P.G. ([PERSON]), N.C., C.D. ([PERSON]), J.-L.E., P.L. ), ONERA (F.B., K.G., V.R., S.S.), ACRI-ST (V.S., A.M.), Adrely (Y.A. ), Oledcomm (B.A., C.B. ([PERSON]), C.D. ([PERSON])), ISIS (A.H. ([PERSON]), A.P., K.S. ), PIT (P.M., S.A.), AMSAT-Francophone (C.M. ); science (climate studies, solar physics, ionosphere), LATMOS (M.M., P.K., A.S., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), ONERA (F.B., K.G., V.R., S.S.); hardware and engineering, LATMOS (M.M., A.-J.V., E.B., P.G. ([PERSON]), N.C., C.D. ([PERSON]), J.-L.E., P.L. ), ONERA (F.B., K.G., V.R., S.S.), Adrelys (Y.A. ), Oledcomm (C.B. ([PERSON]), C.D. ([PERSON])), ISIS (A.H. ([PERSON]), A.P., K.S. ); methodology, LATMOS (M.M., P.K., A.S.,  
Figure 11: Terra-F constellation of 32 satellites that evolve on 8 orbital planes. T.B., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), C.D. ([PERSON]), A.F. ); formal analysis, LATTOS (M.M., P.K., A.S., T.B., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), C.D. ([PERSON]), A.F. ); resources, LATTOS (M.M., P.K., A.S., T.B., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), C.D. ([PERSON]), A.F., A.-J.V., E.B., P.G. ([PERSON]), N.C., C.D. ([PERSON]), J.-L.E., P.L. ), ONERA (F.B., K.G., V.R., S.S.), ACRI-ST (V.S., A.M.), Adrelys (Y.A. ), Oledcomann (B.A., C.B. (C.) ([PERSON]), C.D. ([PERSON]), ISIS (A.H. ([PERSON]), A.P., K.S. ), PIT (P.M., S.A.), AMSAT-Francophone (C.M. ); writing--original draft preparation, LATTOS (M.M., P.K., A.S., T.B., S.B., L.D., P.G. ([PERSON]), A.H. ([PERSON]), C.D. ([PERSON]), A.F., A.-J.V., E.B., P.G. ([PERSON]), N.C., C.D. ([PERSON]), J.-L.E., P.L. ), ONERA (F.B., K.G., V.R., S.S.), ACRI-ST (V.S., A.M.), Adrelys (Y.A. ), Oledcomm (B.A., C.B. ([PERSON]), C.D. ([PERSON])), ISIS (A.H. ([PERSON]), A.P., K.S. ), PIT (P.M., S.A.), AMSAT-Francophone (C.M. ); writing--review and editing, LATTOS (M.M., P.K., A.S., T.B., S.B., L.D., A.F. ), and ONERA (F.B., K.G., V.R., S.S.); project administration, LATTOS (M.M. ); funding acquisition, LATTOS (M.M. ), ONERA (F.B. ), ACRI-ST (A.M.), Adrelys (Y.A. ), Oledcomm (B.A.). All authors have read and agreed to the published version of the manuscript.