<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 20:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.24 (083) 20:50:00</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">
FF202608303242050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.690" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.333" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="472.442" 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="1.435" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.101" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.513" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.525" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.735" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.917" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.075" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="112.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="179">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.4 11.45 11.5 11.55 11.6 11.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 285.000 286.500 288.000 289.500 291.000 292.500 294.000 295.500 297.000 298.500 300.000 300.000 300.000 301.667 303.333 305.000 300.000 300.000 302.500 305.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 316.667 318.333 320.000 320.000 320.000 321.000 322.000 323.000 324.000 325.000 326.000 327.000 328.000 329.000 330.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 406.667 408.333 410.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 426.250 427.500 428.750 430.000 430.000 435.000 435.000 435.000 435.000 435.000 435.000 450.000 450.000 450.000 452.500 455.000 460.000 460.000 465.000 465.000 467.155 469.613 472.442 475.733 479.610 484.243 489.878 496.879 505.813 517.608 533.898 557.861
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 54 0 0 0 57 0 0 63 63 66 66 69 69 66 66 60 66 54 48 60 57 0 0 54 0 48 0 0 66 0 63 69 54 0 66 66 63 57 0 0 0 0 0 0 0 0 0 66 69 69 0 0 63 66 57 0 60 66 69 69 72 0 0 69 0 0 66 48 69 0 63 0 69 0 60 0 66 0 72 63 0 51 0 66 66 72 60 66 69 69 0 66 66 54 60 66 69 72 69 66 69 72 60 0 66 72 72 63 66 69 57 60 66 66 54 60 66 69 69 66 66 66 66 69 69 66 66 66 66 57 63 66 0 63 63 0 0 60 63 0 60 63 54 57 48 0 0 0 51 60 48 0 57 54 0 51 42 48 54 0 54 51 51 51 54 0 51 54 54 51 54 51 54 42 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 1.171875 1.953125 -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 -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 1.953125 -1.953125 -1.953125
</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" >
89.965 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.754 125.0 130.0 133.509 135.0 140.0 145.0 145.263 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.101 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.959 1.243 1.389 1.435 1.409 1.328 1.285 1.285 1.285 1.285 1.304 1.368 1.432 1.435 1.555 1.677 1.8 1.927 2.058 2.197 2.345 2.502 2.671 2.852 3.047 3.257 3.481 3.72 3.973 4.239 4.516 4.801 5.095 5.393 5.696 6.0 6.307 6.614 6.921 7.229 7.535 7.841 8.146 8.449 8.752 9.052 9.35 9.644 9.934 10.218 10.492 10.754 10.998 11.218 11.403 11.543 11.628 11.65 11.65 11.636 11.604 11.554 11.488 11.407 11.312 11.204 11.085 10.955 10.816 10.669 10.514 10.352 10.185 10.013 9.837 9.657 9.475 9.291 9.105 8.918 8.731 8.544 8.357 8.17 7.985 7.801 7.618 7.438 7.259 7.083 6.909 6.737 6.568 6.402 6.239 6.078 5.921 5.767 5.615 5.467 5.322 5.18 5.041 4.905 4.772 4.643 4.516 4.392 4.272 4.154 4.039 3.927 3.818 3.711 3.608 3.507 3.408 3.313 3.219 3.129 3.04 2.954 2.87 2.789 2.71 2.633 2.558 2.485 2.414 2.345 2.278 2.213 2.149 2.088 2.028 1.97 1.913 1.858 1.805 1.753 1.702 1.653 1.606 1.559 1.515 1.471 1.428 1.387 1.347 1.308 1.27 1.234 1.198 1.163 1.13 1.097 1.065 1.035 1.005 0.976 0.947 0.92 0.893 0.867 0.842 0.818 0.794 0.771 0.749 0.727 0.706 0.686 0.666 0.647 0.628 0.61 0.592 0.575 0.558 0.542 0.526 0.511 0.496 0.482 0.468 0.454

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.435" PeakHeight="110.0" Num="3" Error="0.0">
-27.968 9.691 -1.758
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.435" EndFrequency="11.65" PeakHeight="364.101" Num="5" zHalfNm="291.513" Error="3.393">
-191.9 -34.73 11.754 -6.942 2.98
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.263" Depth="0.15"/>
<TopsideChapman PeakHeight="364.101" PeakDensity="1683902.0" PeakScaleHeight="53.075" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
