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A closer look at the test data from yesterday reveals a few things:</div>
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<b>Important note:</b> All the 'dead' and 'weak' antennas listed below were not flagged by the on-line system. </div>
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By 'no PDif', I mean that the PDif values were less than 10 milli-counts. Typical PDif values are 100 to 500 milli-counts. Some are as low as 50, the highest I've seen is 6200 millicounts (this from ea01 at Ku-band — which has a serious 'PDif' problem as
well).</div>
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By 'dead', I mean correlations show only noise on a strong source. </div>
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<div class="elementToProof">X-band</div>
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<div class="elementToProof">No PDif: ea01 in B and D, ea09 in B, ea12 in C. </div>
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<div class="elementToProof">Notes: ea01 had very low visibility amplitudes in IFs B and D. ea09 has low visibilities in IFs B and D</div>
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<div class="elementToProof">Ku-band</div>
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<div class="elementToProof">No PDif: ea09 in A, ea12 in C, ea25 and B and D. </div>
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<div class="elementToProof">Notes: all the above had zero visibility amplitudes —showing only noise. </div>
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<div class="elementToProof">K-band</div>
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<div class="elementToProof"> No PDif: ea09 in B, ea12 in D</div>
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<div class="elementToProof">Notes: ea07 very weak in A and C, ea09 dead in B, ea12 dead in D</div>
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<div class="elementToProof">Ka-band</div>
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<div class="elementToProof">No PDif: ea09 in B, ea12 in D</div>
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<div class="elementToProof">Notes: ea01 very wek in A and B, ea07 dead in C, ea09 dead on B, ea12 dead in D, ea25 dead in A and C. </div>
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<div class="elementToProof">Q-band</div>
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<div class="elementToProof">No PDif: ea02 in A and C, ea09 in B, ea12 in D</div>
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<div class="elementToProof">Notes: ea02 dead on all IFs. ea09 dead on B, ea12 dead in D, ea25 dead in A and C. </div>
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Other than these few issues, the data quality from yesterday's test is outstanding. Referenced pointing was done 9 times over slightly more than an hour — all solutions were good, with residual pointing errors less than 10 arcseconds. </div>
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