| Target | RCW38 |
| Observation date | 2019/11 |
| Receiver | CAT10 (DSB) |
| Spectrometer | WHSF (FX mode) |
| Mode | OTF mapping |
| Target line | [CI](3P2-3P1) |
| Frequency | 809.341970 GHz |
| Bandwidth | 1024 MHz |
| Channel spacing | 0.5 MHz |
| Velocity resolution | smoothed to 0.5 km/s |
| Beam size (FWHM) | 12.6 arcsec x 13.1 arcsec (after convolution with the spheroidal function) |
| Mapping size | 6 arcmin x 4 arcmin |
| Total mapping time | ~4 hrs |
| Tsys | 2000 K at the zenith |
| PWV | ~0.5 - 0.8 mm |