<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 12:50:00.000"
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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.28 (059) 12:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605902281250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.583" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.184" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.192" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.267" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="351.727" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.089" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.072" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.147" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.260" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.769" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 235.000 240.000 240.000 245.000 250.000 255.000 260.000 265.000 265.000 270.000 270.000 275.000 277.000 279.000 281.000 283.000 285.000 285.000 287.000 289.000 291.000 293.000 295.000 297.000 299.000 301.000 303.000 305.000 305.000 306.250 307.500 308.750 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 332.500 335.000 335.000 336.667 338.333 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 417.500 420.000 420.000 425.000 425.000 430.000 430.000 430.000 430.000 433.333 436.667 440.000 440.000 445.000 445.000 445.000 450.000 452.500 455.000 455.000 455.000 460.000 460.000 465.000 467.500 470.000 470.000 470.000 472.500 475.000 480.000 485.000 490.000 492.500 495.000 498.883 503.152 507.868 513.104 518.953 525.527 532.972 541.471 551.267 562.681 576.148
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 45 45 0 45 0 48 45 51 54 57 51 0 0 51 0 0 54 0 0 0 0 0 0 0 0 0 51 54 0 51 0 60 48 0 57 57 51 54 57 57 57 54 54 57 57 0 54 57 0 0 60 60 57 60 54 60 54 57 60 54 60 60 60 63 60 63 54 63 63 60 63 54 60 54 60 54 60 54 60 57 60 57 60 63 60 54 63 63 60 63 57 63 63 60 0 0 57 60 51 57 57 54 0 51 0 54 54 57 51 0 51 54 51 42 51 51 51 48 0 48 0 48 48 48 45 45 42 45 42 0 42
</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 1.171875 0.390625 -1.171875 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 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" >
89.514 90.0 95.0 100.0 105.0 110.0 112.377 114.755 115.0 117.132 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.727 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.147 2.763 3.088 3.192 3.07 3.07 3.083 3.192 3.276 3.422 3.572 3.724 3.88 4.04 4.204 4.372 4.544 4.72 4.9 5.082 5.267 5.454 5.642 5.831 6.021 6.212 6.402 6.593 6.783 6.972 7.162 7.35 7.538 7.725 7.912 8.099 8.285 8.471 8.657 8.842 9.028 9.214 9.399 9.585 9.771 9.957 10.142 10.326 10.508 10.685 10.855 11.012 11.146 11.246 11.296 11.3 11.298 11.285 11.263 11.23 11.189 11.139 11.08 11.014 10.941 10.861 10.775 10.683 10.585 10.483 10.376 10.265 10.15 10.031 9.91 9.786 9.659 9.531 9.4 9.268 9.135 9.001 8.866 8.73 8.594 8.458 8.321 8.185 8.049 7.914 7.779 7.645 7.511 7.379 7.247 7.117 6.988 6.86 6.733 6.608 6.484 6.361 6.24 6.121 6.003 5.887 5.772 5.659 5.548 5.438 5.33 5.224 5.119 5.016 4.915 4.815 4.718 4.621 4.527 4.434 4.343 4.253 4.165 4.079 3.994 3.911 3.83 3.75 3.671 3.594 3.518 3.444 3.372 3.3 3.231 3.162 3.095 3.029 2.965 2.902 2.84 2.779 2.72 2.662 2.605 2.549 2.495 2.441 2.389 2.337 2.287 2.238 2.19 2.143 2.096 2.051 2.007 1.964 1.921 1.88 1.839 1.799 1.76 1.722 1.685 1.648 1.613 1.578 1.544 1.51 1.477 1.445 1.414 1.383 1.353 1.324 1.295 1.267 1.239 1.212 1.186 1.16 1.135 1.11 1.086 1.062

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.192" PeakHeight="110.0" Num="3" Error="0.0">
-30.351 12.931 -3.066
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.192" EndFrequency="11.3" PeakHeight="351.727" Num="5" zHalfNm="252.089" Error="3.137">
-194.674 -55.988 22.028 -7.509 1.548
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.132" Depth="0.122"/>
<TopsideChapman PeakHeight="351.727" PeakDensity="1584243.1" PeakScaleHeight="70.769" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
