<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 20:20:00.000"
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" >
2026.10.23 (296) 20:20:00</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">
FF202629610232020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.466" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.241" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="430.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="430.000" 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="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.638" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.947" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="293.659" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.417" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="143.351" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.802" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.126" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.730" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 430.000 432.500 435.000 437.500 440.000 445.000 445.000 445.000 447.500 450.000 455.000 455.000 455.000 460.000 465.000 467.500 470.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 490.000 490.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 520.000 520.000 520.000 530.000 530.000 535.000 540.000 545.000 550.000 557.528 565.928 575.363 586.035 598.205 612.213 628.507 647.699
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 0 66 0 63 54 63 69 0 72 66 66 69 0 66 0 66 57 48 60 51 0 66 0 0 0 0 63 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 39 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 2.734375 -1.953125 1.171875 -0.390625 -1.171875 -2.734375 -0.390625 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" >
89.879 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.346 125.0 130.0 130.692 135.0 140.0 141.038 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.947 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21 1.096 1.419 1.585 1.638 1.606 1.506 1.496 1.496 1.496 1.496 1.555 1.624 1.638 1.75 1.888 2.026 2.168 2.316 2.471 2.635 2.808 2.991 3.184 3.388 3.602 3.824 4.054 4.291 4.532 4.777 5.024 5.271 5.52 5.767 6.014 6.26 6.503 6.746 6.986 7.224 7.461 7.695 7.928 8.158 8.386 8.612 8.835 9.056 9.274 9.488 9.698 9.904 10.104 10.298 10.484 10.66 10.825 10.977 11.112 11.229 11.323 11.393 11.436 11.45 11.45 11.445 11.43 11.406 11.373 11.331 11.282 11.225 11.161 11.09 11.013 10.931 10.842 10.749 10.651 10.549 10.443 10.333 10.22 10.104 9.985 9.864 9.741 9.616 9.489 9.361 9.232 9.102 8.971 8.84 8.709 8.577 8.445 8.313 8.182 8.05 7.92 7.79 7.66 7.532 7.404 7.278 7.152 7.027 6.904 6.782 6.661 6.541 6.423 6.306 6.191 6.077 5.965 5.854 5.744 5.636 5.53 5.425 5.322 5.22 5.12 5.022 4.925 4.829 4.735 4.643 4.552 4.463 4.375 4.289 4.204 4.121 4.039 3.959 3.88 3.803 3.727 3.652 3.579 3.507 3.436 3.367 3.299 3.232 3.167 3.102 3.039 2.978 2.917 2.858 2.799 2.742 2.686 2.631 2.578 2.525 2.473 2.422 2.373 2.324 2.276 2.229 2.184 2.139 2.095 2.051 2.009 1.968 1.927 1.887 1.848 1.81 1.773 1.736 1.7 1.665 1.63 1.597 1.564 1.531 1.499 1.468

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.638" PeakHeight="110.0" Num="3" Error="0.0">
-28.428 10.273 -1.966
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.638" EndFrequency="11.45" PeakHeight="394.947" Num="5" zHalfNm="293.659" Error="3.393">
-241.71 -21.362 14.36 -7.965 2.768
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.038" Depth="0.142"/>
<TopsideChapman PeakHeight="394.947" PeakDensity="1626581.9" PeakScaleHeight="74.126" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
