<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 22:30:00.000"
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" >
2026.03.09 (068) 22:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606803092230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.545" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.372" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.814" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="431.254" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="372.809" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.426" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.284" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.225" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.713" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="93.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="166">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 355.000 352.500 350.000 350.000 350.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 356.000 357.000 358.000 359.000 360.000 360.000 360.417 360.833 361.250 361.667 362.083 362.500 362.917 363.333 363.750 364.167 364.583 365.000 365.000 367.500 370.000 365.000 365.682 366.364 367.045 367.727 368.409 369.091 369.773 370.455 371.136 371.818 372.500 373.182 373.864 374.545 375.227 375.909 376.591 377.273 377.955 378.636 379.318 380.000 380.000 380.000 382.500 385.000 386.111 387.222 388.333 389.444 390.556 391.667 392.778 393.889 395.000 396.111 397.222 398.333 399.444 400.556 401.667 402.778 403.889 405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 411.667 413.333 415.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 422.500 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 450.000 450.000 452.500 455.000 455.000 455.000 455.000 455.000 460.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 470.000 472.500 475.000 477.500 480.000 482.500 485.000 487.500 490.000 490.000 490.000 490.000 497.500 505.000 502.500 500.000 502.500 505.000 506.598 508.359 510.311 512.486 514.926 517.680 520.814 524.413 528.588 533.490 539.327 546.394 555.126 566.190
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 57 0 72 0 63 0 72 0 72 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 66 69 0 54 66 0 0 66 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 60 60 0 63 0 0 0 54 0 0 0 0 0 54 0 0 0 51 0 0 0 48 54 57 60 63 60 60 60 0 0 51 51 60 60 0 54 60 60 0 54 60 60 45 48 57 63 63 54 54 60 57 60 57 60 0 60 75 75 54 66 0 57 66 69 66 69 69 66 66 63 0 0 60 60 60 63 0 0 0 60 0 0 0 63 60 0 57 0 48 54 57 0 48 51 54 51 51 51 51 51 45 45 48 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 2.734375 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 -2.734375 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 1.953125 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 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 -1.171875 1.171875 1.171875 0.390625 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 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.953125 1.171875
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.301 145.0 150.0 155.0 160.0 165.0 170.0 174.601 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.902 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 431.254 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.342 0.327 0.304 0.272 0.227 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.226 0.25 0.273 0.297 0.321 0.345 0.354 0.407 0.489 0.575 0.667 0.765 0.871 0.987 1.112 1.247 1.392 1.548 1.716 1.894 2.084 2.284 2.496 2.719 2.953 3.197 3.453 3.719 3.995 4.282 4.58 4.887 5.204 5.531 5.868 6.213 6.567 6.929 7.298 7.672 8.05 8.43 8.81 9.184 9.549 9.897 10.223 10.516 10.765 10.96 11.09 11.148 11.15 11.142 11.108 11.05 10.968 10.866 10.745 10.608 10.455 10.29 10.114 9.928 9.734 9.533 9.327 9.116 8.902 8.686 8.469 8.251 8.034 7.817 7.602 7.389 7.178 6.97 6.765 6.563 6.365 6.171 5.98 5.794 5.612 5.434 5.261 5.092 4.927 4.767 4.611 4.46 4.312 4.169 4.03 3.896 3.765 3.638 3.515 3.396 3.281 3.17 3.062 2.957 2.856 2.758 2.663 2.571 2.483 2.397 2.314 2.234 2.157 2.082 2.01 1.94 1.873 1.808 1.745 1.684 1.626 1.569 1.514 1.461 1.41 1.361 1.314 1.268 1.223 1.181 1.139 1.099 1.061 1.024 0.988 0.953 0.92 0.888 0.857 0.827 0.798 0.77 0.743 0.717 0.692 0.667 0.644 0.621 0.6 0.579 0.558 0.539 0.52 0.501 0.484 0.467 0.451 0.435 0.419 0.405 0.391 0.377 0.364 0.351 0.339 0.327 0.315

</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="11.15" PeakHeight="431.254" Num="5" zHalfNm="372.809" Error="3.492">
-209.267 -28.817 16.706 -4.408 1.434
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.902" Depth="0.154"/>
<TopsideChapman PeakHeight="431.254" PeakDensity="1542462.8" PeakScaleHeight="43.713" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
