<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 12:40:00.000"
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="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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.10.24 (297) 12:40:00</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">
FF202629710241240009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.766" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.490" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="440.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="440.000" 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="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.083" 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="3.236" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.289" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="293.690" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="199.351" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.041" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.421" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.657" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.762" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="143.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
440.000 445.000 446.274 447.688 449.268 451.044 453.056 455.352 457.999 461.083 464.722 469.082 474.399 481.028 489.523
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 0 0 48 0 0 0 0 0 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 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875
</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" >
89.507 90.0 95.0 100.0 105.0 110.0 112.189 114.379 115.0 116.568 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.69 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.176 2.801 3.131 3.236 3.114 3.114 3.149 3.236 3.4 3.617 3.827 4.039 4.26 4.492 4.736 4.993 5.259 5.531 5.805 6.076 6.34 6.597 6.844 7.083 7.313 7.534 7.748 7.956 8.157 8.353 8.544 8.73 8.912 9.089 9.262 9.431 9.594 9.75 9.897 10.03 10.146 10.234 10.288 10.3 10.3 10.291 10.272 10.243 10.204 10.157 10.101 10.037 9.966 9.887 9.803 9.713 9.617 9.516 9.411 9.302 9.189 9.073 8.954 8.832 8.708 8.582 8.455 8.326 8.197 8.066 7.935 7.803 7.672 7.54 7.408 7.277 7.147 7.017 6.887 6.759 6.632 6.506 6.381 6.257 6.134 6.013 5.894 5.776 5.659 5.544 5.431 5.319 5.209 5.101 4.994 4.889 4.786 4.685 4.585 4.487 4.391 4.296 4.203 4.112 4.023 3.935 3.849 3.765 3.682 3.601 3.521 3.443 3.367 3.292 3.219 3.147 3.077 3.008 2.941 2.875 2.81 2.747 2.685 2.624 2.565 2.507 2.45 2.395 2.341 2.287 2.235 2.185 2.135 2.086 2.039 1.992 1.947 1.902 1.859 1.816 1.775 1.734 1.695 1.656 1.618 1.581 1.544 1.509 1.474 1.44 1.407 1.375 1.343 1.313 1.282 1.253 1.224 1.196 1.168 1.141 1.115 1.089 1.064 1.04 1.016 0.992 0.97 0.947 0.925 0.904 0.883 0.863 0.843 0.823 0.804 0.786 0.768 0.75 0.733 0.716 0.699 0.683 0.667 0.652 0.637 0.622

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.236" PeakHeight="110.0" Num="3" Error="0.0">
-30.386 12.982 -3.089
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.236" EndFrequency="10.3" PeakHeight="293.69" Num="5" zHalfNm="199.351" Error="6.047">
-163.653 -23.033 14.898 -8.138 2.804
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.568" Depth="0.122"/>
<TopsideChapman PeakHeight="293.69" PeakDensity="1316253.1" PeakScaleHeight="66.762" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
