<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 19:20:00.000"
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="12.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2o cusp not found, 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" >
2026.10.20 (293) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310201920009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.493" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.928" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="510.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="510.000" 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="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="2.418" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.072" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.265" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.440" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="173.809" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.299" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.849" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="180.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
510.000 515.000 520.000 530.000 538.899 549.062 560.778 574.434 590.554 609.871 633.442 662.846 700.552 750.655
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 60 60 60 0 54 0 0 0 0 36 36 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 1.171875 2.734375
</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" >
89.658 90.0 95.0 100.0 105.0 110.0 115.0 115.994 120.0 121.988 125.0 127.982 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.072 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.229 1.623 2.094 2.34 2.418 2.331 2.293 2.293 2.293 2.356 2.418 2.474 2.617 2.764 2.917 3.074 3.236 3.403 3.575 3.751 3.932 4.117 4.306 4.498 4.694 4.893 5.095 5.299 5.506 5.714 5.923 6.133 6.344 6.554 6.763 6.972 7.179 7.384 7.586 7.785 7.981 8.172 8.359 8.54 8.716 8.885 9.048 9.203 9.351 9.49 9.621 9.743 9.856 9.959 10.052 10.134 10.206 10.266 10.316 10.354 10.381 10.396 10.4 10.4 10.396 10.387 10.372 10.352 10.327 10.297 10.263 10.225 10.182 10.135 10.085 10.031 9.974 9.913 9.85 9.783 9.714 9.642 9.568 9.492 9.413 9.333 9.251 9.168 9.082 8.996 8.908 8.819 8.729 8.639 8.547 8.455 8.362 8.269 8.175 8.081 7.986 7.892 7.797 7.703 7.608 7.514 7.419 7.325 7.232 7.138 7.045 6.952 6.86 6.768 6.677 6.586 6.496 6.407 6.318 6.23 6.143 6.056 5.97 5.885 5.8 5.717 5.634 5.552 5.471 5.391 5.311 5.233 5.155 5.078 5.002 4.927 4.853 4.78 4.707 4.636 4.565 4.496 4.427 4.359 4.292 4.225 4.16 4.095 4.032 3.969 3.907 3.846 3.786 3.727 3.668 3.61 3.553 3.497 3.442 3.387 3.334 3.281 3.229 3.177 3.127 3.077 3.028 2.979 2.931 2.884 2.838 2.793 2.748 2.704 2.66 2.617 2.575 2.533 2.492 2.452 2.413 2.373 2.335 2.297 2.26 2.223 2.187

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.418" PeakHeight="110.0" Num="3" Error="0.0">
-29.621 11.88 -2.601
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.418" EndFrequency="10.4" PeakHeight="384.072" Num="5" zHalfNm="259.265" Error="0.653">
-255.992 -0.164 0.104 -0.084 0.046
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.982" Depth="0.125"/>
<TopsideChapman PeakHeight="384.072" PeakDensity="1341935.5" PeakScaleHeight="93.849" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
