<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 16:10:00.000"
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="14.0">
<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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.10.31 (304) 16:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630410311610009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.679" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.943" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.301" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.319" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.561" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.182" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.411" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="177.864" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="67.867" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.807" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="50">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 387.500 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 435.000 435.000 445.000 450.000 450.000 455.000 460.000 465.000 470.000 476.358 483.689 492.232 502.318 514.404 529.151 547.547 571.138 602.485 646.166 711.245 818.541 1028.861
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 0 0 0 0 0 51 54 0 0 51 0 48 57 60 57 57 54 57 54 54 57 54 57 57 57 57 54 54 48 45 57 45 57 57 54 54 51 57 57 54 51 45 42 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.953125 -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 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.496 90.0 95.0 100.0 105.0 110.0 111.92 113.84 115.0 115.76 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.561 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.221 2.857 3.194 3.301 3.178 3.178 3.252 3.301 3.444 3.622 3.807 3.999 4.194 4.393 4.595 4.8 5.007 5.217 5.429 5.645 5.863 6.085 6.309 6.538 6.769 7.004 7.241 7.481 7.722 7.965 8.207 8.447 8.685 8.919 9.147 9.368 9.581 9.785 9.978 10.161 10.332 10.492 10.639 10.775 10.9 11.012 11.114 11.204 11.283 11.352 11.41 11.458 11.496 11.524 11.542 11.55 11.55 11.549 11.542 11.529 11.512 11.489 11.461 11.428 11.39 11.349 11.303 11.252 11.199 11.141 11.08 11.016 10.948 10.878 10.805 10.729 10.651 10.57 10.487 10.403 10.316 10.228 10.138 10.046 9.954 9.86 9.765 9.669 9.572 9.474 9.375 9.276 9.177 9.077 8.977 8.876 8.776 8.675 8.574 8.473 8.372 8.272 8.172 8.071 7.972 7.872 7.773 7.675 7.577 7.479 7.382 7.286 7.19 7.095 7.0 6.906 6.813 6.721 6.63 6.539 6.449 6.36 6.271 6.184 6.097 6.011 5.927 5.843 5.759 5.677 5.596 5.515 5.436 5.357 5.279 5.203 5.127 5.052 4.977 4.904 4.832 4.761 4.69 4.62 4.552 4.484 4.417 4.351 4.285 4.221 4.158 4.095 4.033 3.972 3.912 3.853 3.794 3.736 3.68 3.623 3.568 3.514 3.46 3.407 3.355 3.303 3.252 3.202 3.153 3.104 3.056 3.009 2.963 2.917 2.872 2.827 2.784 2.74 2.698 2.656 2.615 2.574 2.534 2.494 2.456 2.417

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.301" PeakHeight="110.0" Num="3" Error="0.0">
-30.436 13.055 -3.123
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.301" EndFrequency="11.55" PeakHeight="356.561" Num="5" zHalfNm="229.182" Error="4.489">
-246.717 11.012 -8.17 4.305 -1.231
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.76" Depth="0.123"/>
<TopsideChapman PeakHeight="356.561" PeakDensity="1655117.9" PeakScaleHeight="97.807" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
