<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 17:40:00.000"
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 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) 17:40:00</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">
FF202630110281740009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.575" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.459" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="470.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="470.000" 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="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.032" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.190" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="334.663" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.202" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.046" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="151.554" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.459" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="82.384" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="175.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
470.000 470.000 475.000 475.000 480.000 485.000 490.000 500.000 505.000 505.000 515.000 520.000 530.000 540.000 551.023 563.504 577.752 594.171
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 63 63 63 63 0 60 0 0 51
</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
</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" >
89.539 90.0 95.0 100.0 105.0 110.0 113.073 115.0 116.145 119.218 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 334.663 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.038 2.624 2.933 3.032 2.91 2.91 2.91 3.032 3.06 3.231 3.393 3.555 3.719 3.888 4.062 4.244 4.431 4.625 4.823 5.025 5.228 5.43 5.63 5.827 6.02 6.209 6.392 6.571 6.745 6.915 7.08 7.241 7.399 7.553 7.704 7.851 7.996 8.137 8.276 8.412 8.544 8.673 8.798 8.919 9.033 9.141 9.24 9.327 9.4 9.455 9.489 9.5 9.5 9.496 9.486 9.469 9.446 9.418 9.384 9.345 9.301 9.252 9.199 9.141 9.08 9.015 8.946 8.875 8.8 8.722 8.642 8.56 8.475 8.389 8.3 8.21 8.119 8.026 7.932 7.837 7.741 7.645 7.547 7.45 7.352 7.254 7.155 7.057 6.958 6.86 6.762 6.664 6.567 6.47 6.373 6.277 6.181 6.086 5.992 5.899 5.806 5.714 5.623 5.533 5.443 5.355 5.267 5.181 5.095 5.011 4.927 4.844 4.763 4.682 4.603 4.524 4.447 4.37 4.295 4.221 4.148 4.075 4.004 3.934 3.865 3.797 3.73 3.664 3.599 3.535 3.472 3.41 3.349 3.289 3.23 3.172 3.115 3.059 3.004 2.949 2.896 2.843 2.792 2.741 2.691 2.642 2.594 2.546 2.5 2.454 2.409 2.365 2.321 2.279 2.237 2.196 2.155 2.115 2.076 2.038 2.0 1.964 1.927 1.892 1.856 1.822 1.788 1.755 1.723 1.691 1.659 1.628 1.598 1.568 1.539 1.511 1.482 1.455 1.428 1.401 1.375 1.349 1.324 1.3 1.275 1.251

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.032" PeakHeight="110.0" Num="3" Error="0.0">
-30.222 12.741 -2.98
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.032" EndFrequency="9.5" PeakHeight="334.663" Num="5" zHalfNm="219.202" Error="5.013">
-200.607 -25.111 15.906 -8.278 2.645
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.218" Depth="0.122"/>
<TopsideChapman PeakHeight="334.663" PeakDensity="1119727.0" PeakScaleHeight="82.384" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
