Observations 1. Observing Lines & Frequencies H13CO+(J=1-0) 86.75433 GHz 2. Observed Regions/target sources L1551 3. Observing period: Feb. 2002 - Mar. 2002 4. Receiver frontend: BERAS 5. Receiver backend: AC45 6. Frequency & Velocity resolutions: 0.13 km/s 7. Total bandwidth & Velocity Coverage: 32 MHz 8. Typical system temperature & typical atmospheric opacity: 200 - 600 K 9. Main-beam efficiency: 0.51 10. Observation mode: position switch 11. OFF Position (s) if OTF/Position switch is applied; (-30', -15') from the map center (4h31m23.9s, 18d06'24") 12. Pointing Calibration & Pointing error: NML-Tau, < 5" 13. Intensity Calibration & Accuracy of absolute scale: 10% 14. Noise level: 0.10 K 15. CUBE FITS Information Mapping area: BLC (4h31m58.1s, 18d03'14") TRC (4h30m41.9s, 18d18'07") Grid spacing: 20.6" CUBE size: (x, y, z) 54 x 44 x 40 16. Other information