<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 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="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" >
2026.10.23 (296) 19:20:00</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">
FF202629610231920009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.674" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.417" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.413" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="335.269" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.729" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.440" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.231" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.458" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.222" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 405.000 405.000 407.500 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 417.500 420.000 425.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 489.311 494.463 500.729 508.516 518.451 531.567
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 63 45 0 0 0 0 57 0 51 57 0 63 60 60 0 0 0 0 0 0 57 0 54 0 0 42 51 45 39 0 45 60 60 0 63 63 42 0 0 0 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 -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 -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 1.171875 -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" >
89.658 90.0 95.0 100.0 105.0 110.0 115.0 116.019 120.0 122.038 125.0 128.057 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.269 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.229 1.62 2.089 2.335 2.413 2.327 2.288 2.288 2.288 2.35 2.413 2.493 2.687 2.877 3.073 3.277 3.494 3.724 3.971 4.232 4.506 4.79 5.078 5.368 5.656 5.94 6.218 6.489 6.754 7.013 7.265 7.513 7.755 7.994 8.228 8.459 8.688 8.914 9.137 9.359 9.58 9.799 10.018 10.235 10.45 10.664 10.874 11.079 11.274 11.453 11.604 11.709 11.75 11.75 11.743 11.723 11.689 11.642 11.584 11.515 11.435 11.346 11.248 11.142 11.028 10.908 10.781 10.649 10.512 10.37 10.225 10.076 9.925 9.77 9.614 9.456 9.297 9.137 8.976 8.815 8.654 8.493 8.332 8.172 8.013 7.855 7.698 7.542 7.388 7.235 7.084 6.935 6.788 6.643 6.499 6.358 6.219 6.082 5.947 5.814 5.684 5.556 5.43 5.306 5.185 5.066 4.949 4.835 4.723 4.613 4.505 4.4 4.296 4.195 4.096 3.999 3.904 3.811 3.72 3.631 3.544 3.46 3.376 3.295 3.216 3.138 3.062 2.988 2.916 2.845 2.776 2.709 2.643 2.579 2.516 2.454 2.395 2.336 2.279 2.223 2.169 2.116 2.064 2.013 1.964 1.916 1.868 1.823 1.778 1.734 1.691 1.65 1.609 1.569 1.531 1.493 1.456 1.42 1.385 1.351 1.318 1.285 1.253 1.223 1.192 1.163 1.134 1.106 1.079 1.052 1.026 1.001 0.976 0.952 0.928 0.905 0.883 0.861 0.84 0.819 0.799 0.779 0.76 0.741 0.722 0.705 0.687

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.413" PeakHeight="110.0" Num="3" Error="0.0">
-29.616 11.872 -2.598
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.413" EndFrequency="11.75" PeakHeight="335.269" Num="5" zHalfNm="246.729" Error="4.359">
-186.308 -36.056 23.748 -12.149 3.553
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.057" Depth="0.125"/>
<TopsideChapman PeakHeight="335.269" PeakDensity="1712934.2" PeakScaleHeight="62.222" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
