<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-10 -283 23:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.10 (283) 23:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628310102340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.893" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.712" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.442" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.672" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.681" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.671" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.547" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.660" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 367.500 370.000 370.000 380.000 385.000 382.500 380.000 380.000 375.000 376.154 377.308 378.462 379.615 380.769 381.923 383.077 384.231 385.385 386.538 387.692 388.846 390.000 390.000 395.000 395.000 395.000 390.000 385.000 380.000 375.000 370.000 370.000 373.333 376.667 380.000 380.000 380.000 380.000 370.000 370.000 370.214 370.429 370.643 370.857 371.071 371.286 371.500 371.714 371.929 372.143 372.357 372.571 372.786 373.000 373.214 373.429 373.643 373.857 374.071 374.286 374.500 374.714 374.929 375.143 375.357 375.571 375.786 376.000 376.214 376.429 376.643 376.857 377.071 377.286 377.500 377.714 377.929 378.143 378.357 378.571 378.786 379.000 379.214 379.429 379.643 379.857 380.071 380.286 380.500 380.714 380.929 381.143 381.357 381.571 381.786 382.000 382.214 382.429 382.643 382.857 383.071 383.286 383.500 383.714 383.929 384.143 384.357 384.571 384.786 385.000 405.000 410.000 415.000 420.000 426.000 432.000 438.000 444.000 450.000 450.000 450.000 455.000 460.000 460.000 463.956 469.180 476.395 487.009 504.165 536.606
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
81 81 78 78 78 81 81 75 78 0 0 75 78 78 75 81 81 81 75 0 75 78 0 63 63 81 84 72 75 81 0 0 0 69 78 72 72 72 69 69 69 69 75 84 78 81 75 75 81 75 75 0 0 69 78 0 75 72 75 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 0 48 51 51 54 48 0 0 0 0 57 57 60 60 54 51 57 54 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.953125 1.953125 1.953125 1.953125 2.734375 1.953125 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 1.953125 0.390625 1.171875 2.734375 1.953125 1.171875 1.953125 2.734375 1.953125 1.171875 1.171875 1.171875 2.734375 1.171875 1.953125 2.734375 1.953125 2.734375 2.734375 1.953125 1.171875 1.953125 1.953125 2.734375 2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 2.734375 1.953125 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 2.734375 2.734375 2.734375 1.953125 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 1.953125 2.734375 2.734375 2.734375 2.734375 1.953125 2.734375 1.953125 2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 2.734375 1.953125 0.390625 0.390625 -0.390625 -0.390625 2.734375 1.953125 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="166">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.773 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.547 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.32 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.442 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.314 0.289 0.256 0.209 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.236 0.258 0.279 0.301 0.322 0.344 0.354 0.394 0.491 0.617 0.768 0.937 1.121 1.318 1.53 1.756 1.997 2.255 2.533 2.83 3.149 3.492 3.86 4.255 4.679 5.132 5.615 6.127 6.667 7.231 7.813 8.405 8.997 9.575 10.124 10.629 11.074 11.444 11.726 11.912 11.996 12.0 11.988 11.932 11.836 11.702 11.537 11.344 11.127 10.889 10.636 10.369 10.091 9.806 9.515 9.222 8.926 8.631 8.337 8.046 7.759 7.476 7.199 6.928 6.663 6.405 6.153 5.91 5.673 5.444 5.223 5.009 4.802 4.603 4.411 4.226 4.048 3.877 3.712 3.554 3.403 3.257 3.117 2.983 2.854 2.731 2.613 2.499 2.391 2.287 2.188 2.092 2.001 1.914 1.83 1.75 1.673 1.6 1.53 1.463 1.399 1.337 1.279 1.223 1.169 1.118 1.068 1.021 0.977 0.934 0.893 0.853 0.816 0.78 0.746 0.713 0.681 0.651 0.623 0.595 0.569 0.544 0.52 0.497 0.475 0.454 0.434 0.415 0.397 0.379 0.363 0.347 0.331 0.317 0.303 0.289 0.277 0.264 0.253 0.242 0.231 0.221 0.211 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="12.0" PeakHeight="386.442" Num="5" zHalfNm="340.672" Error="4.058">
-161.104 -14.501 7.403 0.519 -1.439
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.32" Depth="0.154"/>
<TopsideChapman PeakHeight="386.442" PeakDensity="1786600.5" PeakScaleHeight="34.66" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
