Coverage for /wheeldirectory/casa-6.7.0-12-py3.10.el8/lib/py/lib/python3.10/site-packages/casatasks/ft.py: 89%

1##################### generated by xml-casa (v2) from ft.xml ######################## 

2##################### 9c1db93ee44949588c604c133f8691c6 ############################## 

3from __future__ import absolute_import 

4import numpy 

5from casatools.typecheck import CasaValidator as _val_ctor 

6_pc = _val_ctor( ) 

7from casatools.coercetype import coerce as _coerce 

8from casatools.errors import create_error_string 

9from .private.task_ft import ft as _ft_t 

10from casatasks.private.task_logging import start_log as _start_log 

11from casatasks.private.task_logging import end_log as _end_log 

12from casatasks.private.task_logging import except_log as _except_log 

13 

14class _ft: 

15 """ 

16 ft ---- Insert a source model as a visibility set 

17 

18  

19 A source model (souce.model image) or components list is converted 

20 into model visibilities that is inserted into the MODEL_DATA column or 

21 alternatively is stored in the header of the MS to be served on the 

22 fly when requested. 

23  

24 Setjy will automatically make this ft step on the sources currently 

25 available, which are 3C48, 3C138, 3C147, 3C286 at 1.4, 5.0, 8.4, 15, 

26 22, 43 GHz. Their location is site dependent. In Charlottesville and 

27 Socorro, the models are in 

28 /usr/lib(lib64)/casapy/data/nrao/VLA/CalModels. 

29 

30 --------- parameter descriptions --------------------------------------------- 

31 

32 vis Name of input visibility file 

33 Default: none 

34  

35 Example: vis='ngc5921.ms' 

36 field Select field using field id(s) or field name(s) 

37 Default: '' (all fields) 

38  

39 BUT, only one source can be specified in a 

40 multi-source vis. 

41  

42  

43 Examples:  

44 field = '1328+307' specifies source 

45 '1328+307' 

46 field = '4' specified field with index 4 

47 spw Select spectral window/channels 

48 Default: '' (all spectral windows and channels) 

49 model Name of input model image(s) 

50 Default: '' (none) 

51  

52 Example: 

53 model='/usr/lib/casapy/data/nrao/VLA/CalModels/3C286_X.im' 

54  

55 NOTE: The model visibilities are scaled from the 

56 model frequency to the observed frequency of the 

57 data. 

58 nterms Number of terms used to model the sky frequency 

59 dependence 

60 Default: 1 (one model image is required) 

61  

62 Example: nterms=3 - represents a 2nd order 

63 Taylor-polynomial in frequency and should be 

64 used in conjuction with coefficient model 

65 images as 

66 model=['xxx.model.tt0','xxx.model.tt1', 

67 'xxx.model.tt2'] 

68 reffreq Reference-frequency about which this Taylor-expansion is 

69 defined. 

70 Default: '' (reads the reference frequency from 

71 the model image) 

72  

73 Example: reffreq = '1.5GHz' 

74 complist Name of component list 

75 Default: none 

76  

77 Example: complist='test.cl' 

78  

79 WARNING: component lists are difficult to make 

80 incremental Add model visibility to the existing model visibilties 

81 stored in the MS 

82 Default: False 

83 Options: False|True 

84 usescratch Story visibilities in MODEL_DATA column? 

85 Default: False 

86 Options: False|True 

87  

88 If True, model visibilities will be stored in the 

89 scratch column MODEL_DATA; if False, the model 

90 visibilities will be generated on the fly (this 

91 mode may save some disk space equivalent to the 

92 volume of the observed data). 

93 RETURNS void 

94 

95 --------- examples ----------------------------------------------------------- 

96 

97  

98 FOR MORE INFORMATION, SEE THE TASK PAGES OF FT IN CASA DOCS: 

99 https://casa.nrao.edu/casadocs/ 

100  

101 

102 

103 """ 

104 

105 _info_group_ = """imaging, calibration""" 

106 _info_desc_ = """Insert a source model as a visibility set""" 

107 

108 def __call__( self, vis='', field='', spw='', model='', nterms=int(1), reffreq='', complist='', incremental=False, usescratch=False ): 

109 schema = {'vis': {'type': 'cReqPath', 'coerce': _coerce.expand_path}, 'field': {'type': 'cStr', 'coerce': _coerce.to_str}, 'spw': {'type': 'cStr', 'coerce': _coerce.to_str}, 'model': {'type': 'cVariant', 'coerce': [_coerce.to_variant]}, 'nterms': {'type': 'cInt'}, 'reffreq': {'type': 'cStr', 'coerce': _coerce.to_str}, 'complist': {'type': 'cStr', 'coerce': _coerce.to_str}, 'incremental': {'type': 'cBool'}, 'usescratch': {'type': 'cBool'}} 

110 doc = {'vis': vis, 'field': field, 'spw': spw, 'model': model, 'nterms': nterms, 'reffreq': reffreq, 'complist': complist, 'incremental': incremental, 'usescratch': usescratch} 

111 assert _pc.validate(doc,schema), create_error_string(_pc.errors) 

112 _logging_state_ = _start_log( 'ft', [ 'vis=' + repr(_pc.document['vis']), 'field=' + repr(_pc.document['field']), 'spw=' + repr(_pc.document['spw']), 'model=' + repr(_pc.document['model']), 'nterms=' + repr(_pc.document['nterms']), 'reffreq=' + repr(_pc.document['reffreq']), 'complist=' + repr(_pc.document['complist']), 'incremental=' + repr(_pc.document['incremental']), 'usescratch=' + repr(_pc.document['usescratch']) ] ) 

113 task_result = None 

114 try: 

115 task_result = _ft_t( _pc.document['vis'], _pc.document['field'], _pc.document['spw'], _pc.document['model'], _pc.document['nterms'], _pc.document['reffreq'], _pc.document['complist'], _pc.document['incremental'], _pc.document['usescratch'] ) 

116 except Exception as exc: 

117 _except_log('ft', exc) 

118 raise 

119 finally: 

120 task_result = _end_log( _logging_state_, 'ft', task_result ) 

121 return task_result 

122 

123ft = _ft( ) 

124