writems(1)

🌸 NAME 🌸

okay so bestie, meet writems — she's from the General Commands Manual section, she's command writems(1), and her whole entire job is: create one or more MeasurementSets. that's it. that's the girl. 💅

✨ SYNOPSIS ✨

writems parm=value ...

literally just throw parameters at her in parm=value form and she goes. no cap. 🫶

🎀 Parameters 🎀

okay this is the part where you actually pay attention, bestie, because there are a LOT of them and every single one is doing something. let's go. 💖

• nms — Number of MeasurementSets to create. 0 means 1 MS without a suffix — that's the default. Anything >0 also creates a MultiMS. 🦋
• msname — Name of the output MeasurementSet. a suffix _p<i> gets added if nms>0.
• ra — One or more J2000 Right Ascensions, written like hh:mm:ss.sss. this is what defines the fields.
• dec — One or more J2000 Declinations, written like dd.mm.ss.sss. also defines the fields.
• anttab — Name of the ANTENNA table giving the antenna parameters to use. if you don't give it, you get zero/empty values. 🙈
• startfreq — Start frequency in Hz, per spw. one single value counts on for the other spws. default is 1e9. ⭐
• chanwidth — Channel frequency width in Hz, per spw. one value applies to all spws. default is 1e6.
• starttime — Start time, like 23Mar2016/12:00:00.
• timestep — Time interval in seconds. default is 1.
• ntime — Number of time steps. default is 1.
• ntimefield — Number of time steps per field. 0 = all fields for all times, which is the default.
• nspw — Number of spectral windows. default is 1.
• npol — Number of polarizations per spectral window. one value applies to all spws. default is 4.
• nchan — Number of channels per spectral window. one value applies to all spws. default is 256.
• nant — Number of antennae to use. if anttab is given, the maximum you can use is its size. default is 0.
• calcuvw — Calculate UVW coordinates? default is false.
• autocorr — Write autocorrelations? default is true.
• weightspectrum — Write the WEIGHT_SPECTRUM column? default is false.
• imagercolumns — Write imager columns (MODEL_DATA, CORRECTED_DATA)? default is false.
• rowwise — Write the data row wise, so that's a put per row. default is true.
• nflagbits — int. Write multiple flag bits (0, 8, 16 or 32) mapped to FLAG. default is 0.
• flagcolumn — Name of the FlagBits column if nflagbits>0. default is "FLAG_BITS".
• tilesize — Size of data tiles in KBytes. default is 1024.
• tilesizefreq — Number of channels in data tiles. default is all channels.
• multifile — Use the MultiFile feature? default is false.
• multihdf5 — Use the MultiHDF5 feature? default is false.
• mfsize — MultiFile/HDF5 block size in KBytes. default is tilesize.
• ashdf5 — bool. Write the data in HDF5 format. default is false.

okay and that's genuinely all of them, i counted, don't come for me. 🍓

and that's the whole page, bestie — every flag, every default, every value, nothing skipped, nothing invented, we ate and left no crumbs. 👑

this lil' icon was brought to you by casacore, dated 2017-11-01, and she's still serving writems(1) energy to this very day. mwah. 💜✨🧚