HALCA (Highly Advanced Laboratory for Communications and Astronomy), also known for its project name VSOP (VLBI Space Observatory Programme), or the code name MUSES-B (for the second of the Mu Space Engineering Spacecraft series), is a Japanese 8 meter diameter radio telescope satellite which was used for Very Long Baseline Interferometry (VLBI).
HALCA (Highly Advanced Laboratory for Communications and Astronomy), juga dikenal dengan nama proyek VSOP (VLBI Space Observatory Programme), atau nama kode MUSES-B (untuk kedua dari seri Mu Space Engineering Spacecraft), adalah satelit teleskop radio diameter 8 meterJepang yang digunakan untuk Very Long Baseline Interferometry (VLBI).