<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 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: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.24 (083) 22:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608303242210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.435" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.564" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="561.013" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="457.102" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="393.223" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.388" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.419" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.854" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="102.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="161">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 365.000 366.667 368.333 370.000 371.667 373.333 375.000 376.667 378.333 380.000 375.000 380.000 385.000 381.667 378.333 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 405.000 395.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 406.176 407.353 408.529 409.706 410.882 412.059 413.235 414.412 415.588 416.765 417.941 419.118 420.294 421.471 422.647 423.824 425.000 425.000 425.000 425.000 425.000 432.500 440.000 440.000 440.000 442.500 445.000 442.500 440.000 445.000 450.000 450.000 451.250 452.500 453.750 455.000 455.000 457.500 460.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 485.000 482.500 480.000 490.000 487.500 485.000 490.000 490.000 495.000 485.000 495.000 495.000 500.000 500.000 500.000 502.500 505.000 505.000 505.000 510.000 515.000 515.000 520.000 520.000 520.000 520.000 522.500 525.000 527.500 530.000 535.000 540.000 545.000 550.000 551.584 553.407 555.528 558.027 561.013 564.645 569.159 574.918 582.522 593.027 608.481
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 66 0 54 0 0 0 0 0 0 60 66 66 57 0 0 69 0 66 69 66 60 63 57 72 69 63 66 0 63 57 0 72 72 75 72 72 72 63 0 69 0 69 75 57 75 66 54 69 0 69 66 0 0 0 57 60 66 69 0 72 60 0 0 78 75 69 75 0 0 72 69 63 69 0 0 60 69 72 69 72 72 69 66 63 0 66 0 57 0 69 54 54 66 0 0 0 69 66 0 63 57 63 66 72 75 75 75 72 72 75 75 78 75 66 60 66 72 66 66 72 72 75 66 57 72 72 69 72 63 66 66 69 66 66 69 69 72 66 63 0 0 63 0 0 60 0 0 54 57 45 54 48 51 51 51 54 45 45 0
</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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.309 145.0 150.0 155.0 160.0 165.0 170.0 172.618 175.0 180.0 185.0 190.0 195.0 200.0 203.927 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 457.102 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.217 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.236 0.261 0.285 0.31 0.335 0.354 0.371 0.444 0.515 0.587 0.662 0.742 0.826 0.916 1.012 1.114 1.222 1.338 1.461 1.592 1.73 1.876 2.031 2.194 2.365 2.545 2.733 2.93 3.136 3.35 3.573 3.804 4.045 4.293 4.551 4.816 5.091 5.373 5.663 5.96 6.265 6.576 6.893 7.215 7.541 7.868 8.195 8.52 8.839 9.147 9.441 9.713 9.956 10.164 10.327 10.44 10.495 10.5 10.496 10.473 10.43 10.368 10.289 10.195 10.086 9.965 9.833 9.69 9.539 9.38 9.214 9.043 8.867 8.688 8.505 8.321 8.135 7.948 7.76 7.573 7.387 7.201 7.017 6.835 6.655 6.477 6.302 6.129 5.96 5.793 5.63 5.469 5.312 5.159 5.008 4.862 4.718 4.578 4.442 4.309 4.179 4.053 3.93 3.81 3.694 3.58 3.47 3.363 3.259 3.158 3.06 2.965 2.872 2.783 2.695 2.611 2.529 2.449 2.372 2.297 2.225 2.154 2.086 2.02 1.956 1.894 1.834 1.776 1.719 1.665 1.612 1.56 1.51 1.462 1.416 1.37 1.327 1.284 1.243 1.204 1.165 1.128 1.092 1.057 1.023 0.99 0.958 0.928 0.898 0.869 0.841 0.814 0.788 0.763 0.739 0.715 0.692 0.67 0.648 0.628 0.607 0.588 0.569 0.551 0.533 0.516 0.499

</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="10.5" PeakHeight="457.102" Num="5" zHalfNm="393.223" Error="3.899">
-231.655 -37.335 17.87 -3.521 1.466
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.927" Depth="0.154"/>
<TopsideChapman PeakHeight="457.102" PeakDensity="1367866.0" PeakScaleHeight="47.854" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
