<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 18:10:00.000"
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="18.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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" >
2026.03.23 (082) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203231810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.398" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.735" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="3.011" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.179" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="398.596" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.746" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.437" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="164.899" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.024" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.779" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="198.040" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="139">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 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 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 245.000 250.000 250.000 255.000 258.333 261.667 265.000 268.333 271.667 275.000 275.000 280.000 281.667 283.333 285.000 290.000 290.000 291.500 293.000 294.500 296.000 297.500 299.000 300.500 302.000 303.500 305.000 310.000 310.000 310.000 312.500 315.000 320.000 322.500 325.000 327.500 330.000 331.667 333.333 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 350.000 355.000 355.000 357.500 360.000 365.000 365.000 370.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 500.000 505.000 510.000 510.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.735 561.987 568.832 576.358 584.670 593.899 604.207 615.792 628.910 643.885 661.143 681.247 704.965
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 48 45 51 51 0 51 0 0 0 51 51 51 0 0 51 0 51 0 0 0 0 0 0 0 57 0 54 57 57 54 0 57 57 0 51 0 48 0 0 51 57 60 0 60 57 60 60 60 51 60 51 60 51 60 48 60 63 60 51 60 51 60 54 63 57 63 57 63 60 54 63 57 63 60 54 63 57 66 63 66 63 54 63 63 63 54 63 66 63 66 63 57 66 63 60 66 63 63 63 60 60 63 57 57 60 57 0 48 57 48 54 51 54 51 51 51 51 51 48 48 51 51 51 48 48 48 48 45 51 48 0 0 42 0 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -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 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 1.171875 -2.734375 -1.171875 0.390625 1.953125
</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" >
89.544 90.0 95.0 100.0 105.0 110.0 113.168 115.0 116.336 119.504 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 398.596 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.024 2.606 2.913 3.011 2.889 2.889 2.889 3.011 3.022 3.14 3.263 3.39 3.522 3.659 3.8 3.945 4.095 4.248 4.404 4.562 4.724 4.887 5.052 5.218 5.385 5.552 5.72 5.889 6.057 6.225 6.393 6.561 6.729 6.896 7.063 7.23 7.396 7.562 7.728 7.893 8.057 8.221 8.385 8.549 8.711 8.874 9.035 9.196 9.355 9.514 9.671 9.826 9.978 10.128 10.274 10.415 10.55 10.677 10.794 10.899 10.989 11.062 11.114 11.144 11.15 11.15 11.145 11.133 11.115 11.091 11.062 11.027 10.986 10.941 10.891 10.837 10.778 10.715 10.648 10.578 10.504 10.427 10.347 10.264 10.179 10.091 10.001 9.909 9.815 9.719 9.622 9.523 9.423 9.322 9.22 9.117 9.014 8.909 8.804 8.699 8.593 8.487 8.381 8.275 8.169 8.064 7.958 7.852 7.747 7.643 7.538 7.434 7.331 7.229 7.126 7.025 6.924 6.825 6.725 6.627 6.53 6.433 6.337 6.242 6.149 6.056 5.964 5.873 5.783 5.694 5.606 5.519 5.433 5.348 5.264 5.181 5.099 5.018 4.938 4.86 4.782 4.705 4.63 4.555 4.482 4.409 4.338 4.267 4.197 4.129 4.061 3.995 3.929 3.865 3.801 3.738 3.676 3.616 3.556 3.497 3.439 3.381 3.325 3.269 3.215 3.161 3.108 3.056 3.005 2.954 2.905 2.856 2.808 2.76 2.714 2.668 2.623 2.579 2.535 2.492 2.45 2.408 2.368 2.327 2.288 2.249

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.011" PeakHeight="110.0" Num="3" Error="0.0">
-30.204 12.716 -2.968
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.011" EndFrequency="11.15" PeakHeight="398.596" Num="5" zHalfNm="274.746" Error="3.483">
-245.489 -46.93 18.953 -6.461 0.835
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.504" Depth="0.122"/>
<TopsideChapman PeakHeight="398.596" PeakDensity="1542462.8" PeakScaleHeight="89.779" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
