<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 20:10:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.15 (074) 20:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403152010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.605" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.045" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="10.450" 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="2.143" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="366.839" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="273.323" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.382" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.426" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.951" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="158">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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" >
250.000 250.000 250.000 255.000 256.000 257.000 258.000 259.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 276.667 278.333 280.000 280.000 280.000 280.000 281.429 282.857 284.286 285.714 287.143 288.571 290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 306.250 307.500 308.750 310.000 312.500 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 327.500 330.000 330.000 335.000 335.000 336.000 337.000 338.000 339.000 340.000 340.000 345.000 345.000 346.250 347.500 348.750 350.000 350.000 355.000 357.500 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 410.000 420.000 420.000 420.000 420.000 425.000 425.000 427.500 430.000 430.000 432.857 435.714 438.571 441.429 444.286 447.143 450.000 450.000 450.000 450.000 452.500 455.000 458.750 462.500 466.250 470.000 472.500 475.000 480.000 485.000 490.000 495.000 500.000 505.000 513.449 522.616 532.599 543.510 555.486 568.691 583.323 599.628
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 60 63 0 63 0 0 54 60 60 0 0 57 51 54 54 0 0 54 0 63 63 63 0 0 0 0 0 0 0 66 63 0 0 0 57 0 0 0 0 57 0 0 54 0 60 63 54 60 0 48 0 60 0 48 54 0 63 48 0 60 0 66 0 0 63 0 60 63 48 57 0 45 0 0 66 66 57 60 0 0 0 66 69 66 54 60 69 69 66 69 57 63 66 60 66 69 63 66 57 63 69 63 66 66 63 69 63 66 66 63 51 57 60 66 63 51 57 63 66 63 63 0 63 63 0 0 63 0 60 0 60 60 60 0 54 54 0 54 0 0 42 48 0 0 0 45 0 45 0 0 0 0 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 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 -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 -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 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -2.734375 -2.734375 1.953125 1.953125 -2.734375
</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" >
89.723 90.0 95.0 100.0 105.0 110.0 115.0 117.432 120.0 124.863 125.0 130.0 132.295 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.839 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.224 1.437 1.856 2.074 2.143 2.085 2.013 2.013 2.013 2.015 2.103 2.143 2.216 2.348 2.479 2.612 2.749 2.892 3.041 3.198 3.364 3.539 3.724 3.919 4.125 4.341 4.565 4.798 5.037 5.281 5.528 5.776 6.026 6.274 6.522 6.768 7.012 7.253 7.492 7.729 7.962 8.194 8.422 8.648 8.871 9.091 9.308 9.521 9.73 9.934 10.131 10.32 10.5 10.666 10.815 10.943 11.044 11.114 11.147 11.15 11.148 11.135 11.111 11.077 11.033 10.979 10.918 10.848 10.77 10.686 10.594 10.497 10.395 10.287 10.174 10.058 9.937 9.814 9.687 9.557 9.426 9.292 9.156 9.019 8.882 8.743 8.603 8.463 8.323 8.183 8.043 7.904 7.765 7.626 7.489 7.352 7.216 7.082 6.948 6.816 6.686 6.556 6.429 6.302 6.178 6.055 5.933 5.814 5.696 5.58 5.466 5.353 5.242 5.133 5.026 4.921 4.817 4.716 4.616 4.518 4.421 4.327 4.234 4.143 4.054 3.966 3.88 3.796 3.714 3.633 3.553 3.476 3.399 3.325 3.252 3.18 3.11 3.041 2.974 2.908 2.844 2.781 2.719 2.658 2.599 2.541 2.484 2.429 2.375 2.322 2.27 2.219 2.169 2.121 2.073 2.026 1.981 1.936 1.893 1.85 1.809 1.768 1.728 1.689 1.651 1.614 1.577 1.542 1.507 1.473 1.44 1.407 1.375 1.344 1.314 1.284 1.255 1.227 1.199 1.172 1.145 1.119 1.094 1.069 1.045 1.021 0.998

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.143" PeakHeight="110.0" Num="3" Error="0.0">
-29.275 11.399 -2.401
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.143" EndFrequency="11.15" PeakHeight="366.839" Num="5" zHalfNm="273.323" Error="4.257">
-209.427 -32.854 12.514 -7.603 2.826
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.295" Depth="0.13"/>
<TopsideChapman PeakHeight="366.839" PeakDensity="1542462.8" PeakScaleHeight="67.951" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
