<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 14:30:00.000"
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" >
2026.03.30 (089) 14:30:00</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">
FF202608903301430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.432" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.391" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.361" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="385.886" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.377" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.945" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="156.690" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="70.149" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.335" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 280.000 282.143 284.286 286.429 288.571 290.714 292.857 295.000 297.143 299.286 301.429 303.571 305.714 307.857 310.000 312.143 314.286 316.429 318.571 320.714 322.857 325.000 325.000 326.000 327.000 328.000 329.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.714 341.429 342.143 342.857 343.571 344.286 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 367.500 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 407.500 410.000 412.500 415.000 417.500 420.000 425.000 427.500 430.000 430.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 457.500 460.000 462.500 465.000 465.000 465.000 470.000 471.875 473.750 475.625 477.500 479.375 481.250 483.125 485.000 489.000 493.000 497.000 501.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 525.000 531.667 538.333 545.000 550.000 555.000 562.500 570.000 575.000 580.000 585.000 595.000 605.000 615.000 625.000 637.338 651.387 667.528
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 54 0 0 48 0 51 51 48 45 54 57 57 57 51 0 0 0 0 0 0 66 66 60 63 66 69 66 66 54 60 63 66 51 57 0 51 60 51 54 54 48 51 45 51 54 57 57 54 60 54 54 51 48 0 48 0 0 0 51 51 0 48 57 54 60 51 57 63 54 57 57 57 60 57 54 0 42 0 45 51 51 51 0 0 51 0 51 0 0 45 0 0 0 0 45 45 45 51 48 42 45 42 0 0 42 45 48 0 48 54 51 45 48 0 48 51 51 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 1.953125 -1.171875 1.953125 -0.390625 -2.734375 -2.734375 1.953125 0.390625 -1.953125 2.734375 -0.390625 -2.734375 -0.390625 -2.734375 1.953125 -0.390625 -1.171875 -1.953125 -2.734375 -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 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 -0.390625 -0.390625 -0.390625 1.953125 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875
</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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.547 113.095 114.642 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.886 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.281 2.935 3.281 3.391 3.268 3.268 3.391 3.404 3.569 3.722 3.87 4.016 4.161 4.308 4.456 4.607 4.761 4.919 5.08 5.246 5.416 5.589 5.767 5.948 6.132 6.32 6.509 6.701 6.895 7.089 7.284 7.48 7.675 7.87 8.064 8.258 8.451 8.642 8.832 9.022 9.21 9.396 9.582 9.766 9.949 10.13 10.31 10.489 10.665 10.84 11.013 11.183 11.349 11.511 11.667 11.816 11.955 12.079 12.186 12.27 12.326 12.349 12.35 12.347 12.337 12.318 12.292 12.259 12.22 12.174 12.121 12.063 11.999 11.93 11.857 11.778 11.695 11.608 11.517 11.423 11.325 11.224 11.12 11.014 10.905 10.794 10.681 10.566 10.45 10.332 10.214 10.094 9.973 9.851 9.729 9.606 9.483 9.359 9.236 9.112 8.989 8.865 8.742 8.62 8.498 8.376 8.255 8.134 8.015 7.896 7.778 7.66 7.544 7.429 7.314 7.201 7.089 6.977 6.867 6.759 6.651 6.544 6.439 6.335 6.232 6.13 6.03 5.931 5.833 5.736 5.641 5.547 5.454 5.363 5.273 5.184 5.096 5.01 4.924 4.84 4.758 4.676 4.596 4.517 4.439 4.363 4.287 4.213 4.14 4.068 3.997 3.927 3.859 3.791 3.725 3.66 3.595 3.532 3.47 3.409 3.349 3.29 3.232 3.174 3.118 3.063 3.009 2.955 2.903 2.851 2.8 2.751 2.702 2.653 2.606 2.56 2.514 2.469 2.425 2.381 2.339 2.297 2.256 2.215 2.176 2.137

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.391" PeakHeight="110.0" Num="3" Error="0.0">
-30.501 13.152 -3.168
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.391" EndFrequency="12.35" PeakHeight="385.886" Num="5" zHalfNm="267.377" Error="5.251">
-233.709 -52.472 19.41 -7.441 2.968
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.642" Depth="0.123"/>
<TopsideChapman PeakHeight="385.886" PeakDensity="1892338.8" PeakScaleHeight="85.335" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
