<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 22:10:00.000"
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: Multiple candidates for F2x 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" >
2026.03.21 (080) 22:10:00</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">
FF202608003212210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.548" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.845" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="9.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="517.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="418.305" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="357.517" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="89.704" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.970" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.422" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="91.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 330.000 325.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 340.000 341.250 342.500 343.750 345.000 340.000 350.000 347.500 345.000 350.000 350.000 350.000 355.000 345.000 350.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 360.000 355.000 357.222 359.444 361.667 363.889 366.111 368.333 370.556 372.778 375.000 373.750 372.500 371.250 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 375.000 376.875 378.750 380.625 382.500 384.375 386.250 388.125 390.000 391.667 393.333 395.000 396.667 398.333 400.000 395.000 400.000 400.000 400.000 400.000 401.667 403.333 405.000 410.000 410.000 412.143 414.286 416.429 418.571 420.714 422.857 425.000 426.250 427.500 428.750 430.000 430.000 432.500 435.000 437.500 440.000 442.500 445.000 447.500 450.000 452.500 455.000 450.000 452.692 455.385 458.077 460.769 463.462 466.154 468.846 471.538 474.231 476.923 479.615 482.308 485.000 490.000 490.000 490.000 495.000 497.500 500.000 505.000 510.000 513.500 517.000 520.500 524.000 527.500 533.187 539.405 546.230 553.758
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 69 69 0 0 0 66 66 0 54 0 75 78 72 0 75 0 60 66 0 69 0 0 0 78 69 0 0 0 0 69 69 0 72 72 69 75 0 0 0 0 63 63 60 72 69 72 75 75 72 66 63 66 0 0 0 60 0 0 0 0 51 0 0 0 0 0 63 54 60 0 66 0 0 66 0 66 66 0 0 63 0 0 63 0 0 63 0 0 0 0 0 54 66 63 0 72 0 0 0 72 69 69 0 0 0 0 0 0 60 0 0 0 60 54 0 0 0 0 0 0 0 0 0 51 57 0 0 0 0 0 0 0 0 51 0 0 0 48 51 0 0 0 0 48 54 0 0 0 0 0 54 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.224 145.0 150.0 155.0 160.0 165.0 170.0 172.448 175.0 180.0 185.0 190.0 195.0 200.0 203.672 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 418.305 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.301 0.266 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.237 0.262 0.287 0.311 0.336 0.354 0.378 0.455 0.527 0.602 0.68 0.765 0.857 0.957 1.068 1.189 1.324 1.471 1.633 1.81 2.003 2.211 2.435 2.673 2.926 3.192 3.471 3.762 4.062 4.373 4.692 5.018 5.351 5.689 6.031 6.375 6.721 7.065 7.406 7.741 8.067 8.379 8.674 8.945 9.187 9.393 9.557 9.674 9.738 9.75 9.749 9.73 9.69 9.631 9.555 9.462 9.355 9.235 9.104 8.962 8.812 8.654 8.49 8.32 8.146 7.969 7.789 7.608 7.425 7.242 7.058 6.876 6.695 6.515 6.336 6.16 5.987 5.816 5.648 5.483 5.321 5.162 5.007 4.855 4.706 4.562 4.42 4.282 4.148 4.017 3.89 3.766 3.646 3.529 3.416 3.305 3.198 3.094 2.994 2.896 2.801 2.709 2.62 2.534 2.45 2.369 2.291 2.215 2.141 2.07 2.001 1.935 1.87 1.808 1.747 1.689 1.632 1.578 1.525 1.474 1.424 1.376 1.33 1.286 1.242 1.201 1.16 1.121 1.083 1.047 1.012 0.978 0.945 0.913 0.882 0.852 0.824 0.796 0.769 0.743 0.718 0.694 0.67 0.648 0.626 0.605 0.584 0.565 0.545 0.527 0.509 0.492 0.475 0.459 0.444 0.429 0.414 0.4 0.387 0.374 0.361 0.349 0.337 0.326 0.315 0.304 0.294

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.75" PeakHeight="418.305" Num="5" zHalfNm="357.517" Error="5.24">
-202.404 -19.521 7.762 -2.699 2.229
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.672" Depth="0.154"/>
<TopsideChapman PeakHeight="418.305" PeakDensity="1179435.5" PeakScaleHeight="45.422" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
