<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 20:50:00.000"
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) 20:50:00</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">
FF202630110282050009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.476" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.876" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="435.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="435.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="521.429" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.004" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="409.764" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="316.880" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.248" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.716" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.957" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.185" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.910" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
435.000 440.000 441.250 442.500 443.750 445.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 497.500 500.000 500.000 503.571 507.143 510.714 514.286 517.857 521.429 525.000 530.000 535.000 541.406 548.739 557.217 567.129 578.875 593.014 610.361 632.147 660.326
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 51 0 0 0 63 0 0 69 0 51 60 0 66 69 69 69 69 66 60 0 66 63 0 0 0 0 0 0 60 60 0 57 57 60 60 60 57 57 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.953125 0.390625 -1.953125 -1.953125 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.266 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.852 130.0 135.0 140.0 143.705 145.0 150.0 155.0 160.0 160.557 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 409.764 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.668 0.87 0.972 1.004 0.987 0.935 0.841 0.794 0.794 0.794 0.794 0.794 0.81 0.872 0.935 0.997 1.004 1.1 1.209 1.321 1.438 1.561 1.692 1.831 1.979 2.137 2.305 2.483 2.671 2.868 3.075 3.291 3.515 3.746 3.983 4.225 4.472 4.723 4.976 5.232 5.489 5.748 6.007 6.267 6.525 6.783 7.04 7.294 7.546 7.795 8.039 8.279 8.513 8.74 8.959 9.169 9.369 9.557 9.732 9.891 10.034 10.158 10.262 10.344 10.403 10.439 10.45 10.45 10.444 10.428 10.403 10.368 10.325 10.273 10.214 10.148 10.074 9.995 9.91 9.819 9.724 9.624 9.52 9.412 9.301 9.187 9.07 8.95 8.829 8.706 8.581 8.455 8.328 8.2 8.072 7.943 7.814 7.685 7.557 7.428 7.3 7.172 7.046 6.92 6.794 6.67 6.547 6.425 6.305 6.185 6.067 5.95 5.835 5.721 5.609 5.498 5.389 5.281 5.175 5.071 4.968 4.867 4.767 4.669 4.573 4.479 4.386 4.294 4.205 4.116 4.03 3.945 3.862 3.78 3.699 3.621 3.543 3.468 3.393 3.321 3.249 3.179 3.111 3.044 2.978 2.913 2.85 2.788 2.727 2.668 2.61 2.553 2.497 2.443 2.389 2.337 2.285 2.235 2.186 2.138 2.091 2.045 2.0 1.956 1.913 1.871 1.829 1.789 1.749 1.711 1.673 1.636 1.6 1.564 1.53 1.496 1.463 1.43 1.398 1.367 1.337 1.307 1.278 1.25 1.222 1.195

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.004" PeakHeight="110.0" Num="3" Error="0.0">
-26.523 8.015 -1.226
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.004" EndFrequency="10.45" PeakHeight="409.764" Num="5" zHalfNm="316.88" Error="2.055">
-243.994 -9.532 6.395 -3.628 1.552
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.557" Depth="0.21"/>
<TopsideChapman PeakHeight="409.764" PeakDensity="1354869.8" PeakScaleHeight="69.185" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
