PICO is set to measure polarization anisotropies with high fidelity and will produce full-sky Compton-y maps, primarily focusing on low-multipole B modes critical for cosmology. The satellite's angular resolution suggests it can measure kSZ temperature anisotropy at l=3000, with E-mode anisotropies plotted up to around 4000. However, the B-mode polarization signal is significantly smaller and affected by noise, particularly due to lensing of large-scale structure mixing E and B modes. Effective measurement of B modes requires multiple frequency bands and strong control of systematic errors. Overall, while PICO will provide valuable data, the high multipoles may not yield useful information for B-mode analysis.