<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 20:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x 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" >
2026.10.28 (301) 20:00:00</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">
FF202630110282000009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.576" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.302" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" 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="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="1.956" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.982" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.143" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.467" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="146.633" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.169" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.526" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="38">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 455.000 455.000 465.000 465.000 467.857 470.714 473.571 476.429 479.286 482.143 485.000 485.000 490.000 500.000 505.000 511.470 518.847 527.334 537.204 548.825 562.707 579.582 600.534 627.245 662.466
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 57 0 0 60 66 60 0 60 63 0 0 63 60 0 0 60 0 0 0 57 57 57 57 57 54 57 54 51 54 48 51 48 48 45
</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 2.734375 -0.390625 -2.734375 -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 -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" >
89.773 90.0 95.0 100.0 105.0 110.0 115.0 118.453 120.0 125.0 126.907 130.0 135.0 135.36 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.982 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.311 1.694 1.893 1.956 1.91 1.823 1.823 1.823 1.823 1.872 1.95 1.956 2.091 2.239 2.391 2.549 2.713 2.885 3.065 3.252 3.448 3.652 3.862 4.078 4.3 4.527 4.757 4.989 5.223 5.458 5.693 5.928 6.162 6.395 6.627 6.857 7.085 7.31 7.533 7.754 7.971 8.184 8.394 8.6 8.8 8.996 9.185 9.368 9.543 9.709 9.866 10.011 10.143 10.262 10.365 10.451 10.518 10.566 10.593 10.6 10.6 10.594 10.58 10.558 10.528 10.492 10.448 10.399 10.343 10.281 10.215 10.143 10.066 9.985 9.9 9.811 9.719 9.623 9.525 9.424 9.32 9.215 9.107 8.998 8.887 8.775 8.661 8.547 8.432 8.316 8.2 8.083 7.967 7.85 7.733 7.617 7.501 7.385 7.269 7.155 7.04 6.927 6.814 6.702 6.592 6.482 6.373 6.265 6.158 6.052 5.947 5.844 5.742 5.641 5.541 5.442 5.345 5.249 5.155 5.061 4.969 4.879 4.79 4.702 4.615 4.529 4.445 4.363 4.281 4.201 4.122 4.045 3.969 3.894 3.82 3.747 3.676 3.606 3.537 3.47 3.403 3.338 3.274 3.211 3.149 3.088 3.028 2.97 2.912 2.856 2.8 2.746 2.692 2.64 2.588 2.538 2.488 2.44 2.392 2.345 2.299 2.254 2.21 2.166 2.124 2.082 2.041 2.001 1.961 1.923 1.885 1.848 1.811 1.775 1.74 1.706 1.672 1.639 1.607 1.575 1.544 1.513 1.483 1.454 1.425 1.397

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.956" PeakHeight="110.0" Num="3" Error="0.0">
-28.999 11.024 -2.252
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.956" EndFrequency="10.6" PeakHeight="373.982" Num="5" zHalfNm="269.143" Error="2.094">
-231.384 -12.401 8.047 -4.162 1.278
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.36" Depth="0.133"/>
<TopsideChapman PeakHeight="373.982" PeakDensity="1394044.6" PeakScaleHeight="77.526" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
