<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 21:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.13 (072) 21:50:00</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">
FF202607203132150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.690" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.536" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="0.427" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="401.587" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="354.758" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.937" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.294" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.582" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.071" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="181">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 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 11.2 11.25 11.3 11.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 330.000 330.714 331.429 332.143 332.857 333.571 334.286 335.000 335.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 346.667 348.333 350.000 350.000 350.000 350.000 350.000 350.000 345.000 345.000 346.429 347.857 349.286 350.714 352.143 353.571 355.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 363.333 361.667 360.000 360.000 360.000 361.667 363.333 365.000 365.000 367.500 370.000 370.000 370.625 371.250 371.875 372.500 373.125 373.750 374.375 375.000 380.000 380.556 381.111 381.667 382.222 382.778 383.333 383.889 384.444 385.000 380.000 382.500 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 396.250 397.500 398.750 400.000 402.500 405.000 406.250 407.500 408.750 410.000 410.000 410.000 410.000 410.000 410.000 412.500 415.000 416.667 418.333 420.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 430.000 427.500 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 445.000 447.500 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 460.000 455.000 460.000 465.000 465.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 480.000 485.000 487.500 490.000 490.000 495.000 502.500 510.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 54 0 0 63 0 0 0 63 0 69 51 0 0 0 0 0 0 69 72 60 0 0 0 0 66 0 0 0 54 54 0 0 0 60 69 0 0 0 0 60 0 0 0 0 0 0 0 60 66 69 69 0 0 0 54 57 63 0 0 0 0 0 0 0 0 0 0 72 72 0 0 0 0 63 0 0 69 57 0 0 60 0 0 0 0 0 57 66 0 66 69 0 60 66 0 66 72 0 69 66 66 69 0 75 0 72 0 72 0 72 0 66 45 0 0 60 0 66 45 66 63 0 63 0 0 60 63 0 69 69 0 66 69 54 60 72 69 66 57 66 66 66 63 0 54 63 66 60 0 54 57 60 60 60 60 0 0 54 57 48 54 54 51 51 45 48 51 48 0 45 0 0 0 45 45 0 45 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="169">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.323 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.936 140.0 145.0 150.0 155.0 160.0 165.0 167.871 170.0 175.0 180.0 185.0 190.0 195.0 196.807 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 401.587 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.282 0.37 0.413 0.427 0.422 0.407 0.38 0.338 0.275 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.256 0.295 0.334 0.374 0.413 0.427 0.503 0.601 0.695 0.791 0.892 0.998 1.111 1.233 1.363 1.503 1.654 1.816 1.99 2.176 2.376 2.589 2.817 3.059 3.316 3.587 3.875 4.177 4.496 4.83 5.18 5.545 5.926 6.323 6.734 7.16 7.598 8.048 8.506 8.968 9.429 9.879 10.306 10.691 11.01 11.235 11.343 11.35 11.34 11.289 11.201 11.079 10.926 10.748 10.547 10.327 10.092 9.844 9.586 9.32 9.049 8.775 8.499 8.223 7.948 7.675 7.406 7.14 6.88 6.625 6.375 6.132 5.895 5.665 5.441 5.225 5.015 4.813 4.617 4.428 4.246 4.07 3.901 3.738 3.582 3.431 3.287 3.148 3.014 2.886 2.763 2.645 2.532 2.424 2.32 2.22 2.125 2.034 1.946 1.862 1.782 1.705 1.631 1.56 1.493 1.428 1.366 1.307 1.25 1.196 1.144 1.094 1.047 1.001 0.958 0.916 0.876 0.838 0.802 0.767 0.734 0.702 0.671 0.642 0.614 0.587 0.562 0.537 0.514 0.492 0.47 0.45 0.43 0.411 0.393 0.376 0.36 0.344 0.329 0.315 0.301 0.288 0.275 0.263 0.252 0.241 0.231 0.22 0.211 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.427" PeakHeight="110.0" Num="3" Error="0.0">
-20.883 3.473 -0.267
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.427" EndFrequency="11.35" PeakHeight="401.587" Num="5" zHalfNm="354.758" Error="3.836">
-178.287 -41.46 15.544 -2.166 1.589
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="86.807" Depth="0.227"/>
<TopsideChapman PeakHeight="401.587" PeakDensity="1598294.0" PeakScaleHeight="35.071" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
