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<p><font face="Liberation Mono">Does ODS take into account the wide
extent of the sidelobes or only the primary beam?</font></p>
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<div class="moz-cite-prefix">On 4/16/26 11:33, Ylva Pihlstrom via
evlatests wrote:<br>
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Then indeed ODS should have been active and reporting to
SpaceX. </div>
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Ylva</div>
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<b>From: </b>Rick Perley <a class="moz-txt-link-rfc2396E" href="mailto:rperley@nrao.edu"><rperley@nrao.edu></a><br>
<b>Date: </b>Thursday, April 16, 2026 at 11:22<br>
<b>To: </b>Ylva Pihlstrom <a class="moz-txt-link-rfc2396E" href="mailto:ypihlstr@nrao.edu"><ypihlstr@nrao.edu></a>,
evlatests <a class="moz-txt-link-rfc2396E" href="mailto:evlatests@nrao.edu"><evlatests@nrao.edu></a><br>
<b>Subject: </b>Re: New (to me) L-band RFI<br>
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Ylva:</div>
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The RFI was seen with the L-band receiver, in the 16<sup>th</sup> spectral
window. The RIF wasn't strong enough to cause problems to any
other SPW — and indeed, the portion of the 16<sup>th</sup> SPW
lying outside that frequency range looked fine. </div>
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Rick</div>
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<b>From:</b> Ylva Pihlstrom <a class="moz-txt-link-rfc2396E" href="mailto:ypihlstr@nrao.edu"><ypihlstr@nrao.edu></a><br>
<b>Sent:</b> Thursday, April 16, 2026 11:17 AM<br>
<b>To:</b> Rick Perley <a class="moz-txt-link-rfc2396E" href="mailto:rperley@nrao.edu"><rperley@nrao.edu></a>; evlatests
<a class="moz-txt-link-rfc2396E" href="mailto:evlatests@nrao.edu"><evlatests@nrao.edu></a><br>
<b>Subject:</b> Re: New (to me) L-band RFI</div>
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That band is exactly the one of SpaceX’s downlinks. If the
L-band receiver was used, the ODS may or may not have been
active depending on the frequencies used in the setup:
<a href="https://obs.vla.nrao.edu/ods/index.html/nrao_ods_status.html" id="OWA8f9c7c7a-61a6-0361-08e8-597a4318b907" class="OWAAutoLink moz-txt-link-freetext" data-auth="NotApplicable" data-outlook-id="2ddc8067-14f0-4f7c-adc0-651cfe1acb10" moz-do-not-send="true">
https://obs.vla.nrao.edu/ods/index.html/nrao_ods_status.html</a>).
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Ylva</div>
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<b>From: </b>evlatests
<a class="moz-txt-link-rfc2396E" href="mailto:evlatests-bounces@listmgr.nrao.edu"><evlatests-bounces@listmgr.nrao.edu></a> on behalf of Rick
Perley via evlatests <a class="moz-txt-link-rfc2396E" href="mailto:evlatests@listmgr.nrao.edu"><evlatests@listmgr.nrao.edu></a><br>
<b>Date: </b>Thursday, April 16, 2026 at 11:11<br>
<b>To: </b>evlatests <a class="moz-txt-link-rfc2396E" href="mailto:evlatests@nrao.edu"><evlatests@nrao.edu></a><br>
<b>Subject: </b>[evlatests] New (to me) L-band RFI<br>
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From data taken two nights ago, a strong RFI source at
L-band is seen — on all antennas. It spans 1.990 to 1.995
GHz. </div>
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Rick</div>
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<pre class="moz-signature" cols="72">--
-
Regards,
Lorant Sjouwerman - Scientific Services - <a class="moz-txt-link-abbreviated" href="mailto:lsjouwerman@nrao.edu">lsjouwerman@nrao.edu</a>
(he, him, his) ----------------------------------------------
c/o NRAO Array Operations Center Phone: +1-575-835-7332
P.O. Box O (1011 Lopezville Rd) Switch: +1-575-835-7000
Socorro NM 87801 Fax: +1-575-835-7027
Also a PandA Adjunct Professor at the University of New Mexico</pre>
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