<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 22:00:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Moderate F-spread, 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" >
2026.10.28 (301) 22:00:00</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">
FF202630110282200009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.330" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.540" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.450" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="618.674" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="486.617" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="410.769" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.511" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.936" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.218" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.138" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="42">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
510.000 550.000 550.000 550.000 532.500 515.000 519.318 523.636 527.955 532.273 536.591 540.909 545.227 549.545 553.864 558.182 562.500 566.818 571.136 575.455 579.773 584.091 588.409 592.727 597.045 601.364 605.682 610.000 610.000 610.000 610.000 610.000 610.000 610.000 610.000 610.000 610.000 610.000 612.500 614.634 618.674 629.228
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 60 54 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 57 57 66 66 66 66 63 69 63 69 63 63 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -0.390625 0.390625 0.390625 1.953125 -2.734375 -2.734375 -0.390625 -0.390625 -0.390625 -1.953125 -2.734375 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 2.734375 -2.734375 -2.734375 -2.734375 2.734375 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.839 145.0 150.0 155.0 160.0 165.0 170.0 173.677 175.0 180.0 185.0 190.0 195.0 200.0 205.0 205.516 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 486.617 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.326 0.303 0.27 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.231 0.255 0.279 0.303 0.327 0.352 0.354 0.418 0.471 0.522 0.574 0.627 0.683 0.743 0.808 0.878 0.954 1.036 1.125 1.221 1.323 1.432 1.546 1.665 1.788 1.915 2.044 2.175 2.308 2.442 2.577 2.713 2.849 2.987 3.124 3.263 3.402 3.542 3.683 3.824 3.967 4.11 4.255 4.401 4.548 4.696 4.846 4.997 5.15 5.304 5.461 5.618 5.777 5.937 6.098 6.259 6.418 6.573 6.722 6.857 6.973 7.056 7.097 7.1 7.097 7.084 7.061 7.028 6.987 6.936 6.879 6.814 6.743 6.666 6.583 6.496 6.405 6.31 6.212 6.112 6.009 5.904 5.797 5.689 5.58 5.471 5.361 5.251 5.141 5.032 4.923 4.814 4.707 4.6 4.495 4.39 4.287 4.186 4.085 3.986 3.889 3.794 3.7 3.607 3.517 3.428 3.341 3.255 3.172 3.09 3.01 2.931 2.855 2.78 2.707 2.635 2.565 2.497 2.431 2.366 2.302 2.24 2.18 2.121 2.064 2.008 1.954 1.9 1.849 1.798 1.749 1.701 1.655 1.61 1.565 1.522 1.481 1.44 1.4 1.362 1.324 1.288 1.252 1.217 1.184 1.151 1.119 1.088 1.058 1.029 1.0 0.972 0.945 0.919 0.894 0.869 0.845 0.821 0.798 0.776 0.755 0.734 0.713 0.693 0.674 0.655 0.637

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.1" PeakHeight="486.617" Num="5" zHalfNm="410.769" Error="7.45">
-254.483 -51.542 35.081 -16.961 6.804
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="95.516" Depth="0.154"/>
<TopsideChapman PeakHeight="486.617" PeakDensity="625434.25" PeakScaleHeight="55.138" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
