<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.26 (085) 21:50:00</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">
FF202608503262150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.687" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.330" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="0.387" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="395.369" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="342.360" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.939" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.734" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.454" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.672" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="145">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 321.250 322.500 323.750 325.000 327.500 330.000 330.000 330.000 330.833 331.667 332.500 333.333 334.167 335.000 330.000 330.909 331.818 332.727 333.636 334.545 335.455 336.364 337.273 338.182 339.091 340.000 340.000 341.250 342.500 343.750 345.000 340.000 340.000 343.333 346.667 350.000 345.000 345.833 346.667 347.500 348.333 349.167 350.000 350.000 352.500 355.000 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 362.000 364.000 366.000 368.000 370.000 371.250 372.500 373.750 375.000 375.000 375.000 370.000 372.500 375.000 376.000 377.000 378.000 379.000 380.000 381.667 383.333 385.000 386.667 388.333 390.000 391.667 393.333 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.833 401.667 402.500 403.333 404.167 405.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 421.667 423.333 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 473.879 478.241 483.184 488.831 495.344 502.940 511.913 522.674
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 63 0 63 0 54 60 60 0 0 0 0 0 54 63 0 0 0 0 0 0 0 0 0 0 57 60 0 0 0 60 63 0 54 0 54 60 0 0 0 48 0 0 66 0 63 66 0 0 60 0 66 66 0 66 69 0 66 0 0 72 0 63 0 51 0 60 0 63 0 0 69 0 0 66 0 69 0 60 0 69 0 60 0 0 54 54 60 63 48 57 57 0 0 0 0 0 66 69 60 63 66 57 60 66 69 57 63 66 0 0 69 69 69 63 69 66 63 66 0 63 66 60 63 54 60 66 63 63 63 60 63 57 63 60 60 54 0 0 0 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 -1.171875 -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 -1.171875 -1.171875 1.953125 -0.390625 1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 2.734375 -0.390625 2.734375 2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.877 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.511 140.0 145.0 150.0 155.0 160.0 165.0 169.022 170.0 175.0 180.0 185.0 190.0 195.0 198.533 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 395.369 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.256 0.335 0.375 0.387 0.383 0.37 0.348 0.315 0.266 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.238 0.27 0.301 0.333 0.365 0.387 0.417 0.51 0.603 0.7 0.804 0.916 1.038 1.169 1.312 1.467 1.634 1.814 2.006 2.212 2.431 2.663 2.908 3.166 3.436 3.719 4.015 4.322 4.64 4.97 5.31 5.659 6.017 6.382 6.753 7.127 7.502 7.873 8.236 8.583 8.907 9.198 9.444 9.633 9.754 9.8 9.8 9.787 9.746 9.68 9.59 9.48 9.351 9.206 9.047 8.876 8.694 8.505 8.308 8.106 7.901 7.692 7.482 7.271 7.061 6.851 6.643 6.437 6.233 6.033 5.836 5.643 5.454 5.269 5.089 4.913 4.742 4.575 4.413 4.255 4.103 3.955 3.811 3.672 3.538 3.407 3.282 3.16 3.043 2.929 2.82 2.714 2.612 2.514 2.419 2.328 2.239 2.155 2.073 1.994 1.918 1.845 1.775 1.707 1.642 1.579 1.518 1.46 1.404 1.351 1.299 1.249 1.201 1.155 1.11 1.068 1.027 0.987 0.949 0.913 0.877 0.844 0.811 0.78 0.75 0.721 0.693 0.666 0.641 0.616 0.592 0.569 0.547 0.526 0.506 0.487 0.468 0.45 0.432 0.416 0.4 0.384 0.369 0.355 0.341 0.328 0.316 0.303 0.292 0.28 0.27 0.259 0.249 0.24 0.23 0.221 0.213 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.387" PeakHeight="110.0" Num="3" Error="0.0">
-19.852 2.926 -0.197
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.387" EndFrequency="9.8" PeakHeight="395.369" Num="5" zHalfNm="342.36" Error="2.637">
-182.415 -25.28 12.339 -2.69 1.21
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="88.533" Depth="0.187"/>
<TopsideChapman PeakHeight="395.369" PeakDensity="1191563.2" PeakScaleHeight="39.672" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
