<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 18:50:00.000"
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: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.04.03 (093) 18:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304031850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.732" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.049" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="462.273" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.769" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="336.053" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.209" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.552" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.754" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.307" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.224" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="151">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 215.000 220.000 222.222 224.444 226.667 228.889 231.111 233.333 235.556 237.778 240.000 240.000 245.000 245.000 245.000 246.667 248.333 250.000 251.667 253.333 255.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 271.250 272.500 273.750 275.000 277.500 280.000 282.000 284.000 286.000 288.000 290.000 290.000 290.000 290.000 291.429 292.857 294.286 295.714 297.143 298.571 300.000 305.000 305.000 305.000 305.000 305.000 310.000 315.000 315.000 315.000 320.000 321.250 322.500 323.750 325.000 325.000 327.500 330.000 330.000 332.500 335.000 335.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 355.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 420.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 437.727 440.455 443.182 445.909 448.636 451.364 454.091 456.818 459.545 462.273 465.000 470.151 476.144 483.202 491.638 501.898 514.646 530.912
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 45 48 0 48 0 48 0 0 0 0 51 57 54 57 54 0 0 0 0 0 57 0 0 60 51 0 60 60 60 60 63 0 0 48 63 0 63 0 0 0 0 63 66 66 66 0 0 0 0 0 0 66 66 66 66 0 60 69 66 69 69 63 0 0 0 66 69 0 63 69 0 63 69 57 63 66 0 60 66 66 72 0 69 0 69 0 57 60 0 54 63 69 57 63 69 57 63 66 63 63 69 60 66 66 69 66 66 66 66 63 66 60 66 57 63 66 63 66 54 63 66 66 63 51 57 60 60 60 51 60 51 57 51 54 54 54 51 54 0 51 0 48 0 51 51 51 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -2.734375 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 -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 -1.953125 -2.734375
</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" >
89.586 90.0 95.0 100.0 105.0 110.0 114.276 115.0 118.551 120.0 122.827 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.053 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.86 2.397 2.679 2.769 2.647 2.647 2.647 2.688 2.769 2.827 2.961 3.097 3.236 3.381 3.53 3.686 3.849 4.019 4.196 4.381 4.573 4.771 4.976 5.187 5.402 5.62 5.842 6.065 6.289 6.514 6.739 6.964 7.189 7.412 7.635 7.858 8.08 8.301 8.522 8.742 8.962 9.182 9.402 9.621 9.838 10.054 10.265 10.469 10.658 10.822 10.943 10.998 11.0 10.995 10.976 10.943 10.898 10.839 10.77 10.69 10.6 10.502 10.395 10.281 10.16 10.033 9.9 9.763 9.621 9.476 9.328 9.177 9.023 8.868 8.712 8.554 8.396 8.238 8.079 7.921 7.763 7.606 7.449 7.294 7.14 6.988 6.837 6.688 6.541 6.395 6.252 6.11 5.971 5.834 5.699 5.566 5.436 5.308 5.182 5.059 4.938 4.819 4.703 4.589 4.477 4.368 4.261 4.156 4.054 3.954 3.856 3.76 3.666 3.575 3.485 3.398 3.312 3.229 3.148 3.068 2.99 2.915 2.841 2.769 2.698 2.629 2.562 2.497 2.433 2.371 2.31 2.251 2.193 2.137 2.082 2.029 1.976 1.926 1.876 1.828 1.78 1.735 1.69 1.646 1.604 1.562 1.522 1.482 1.444 1.407 1.37 1.335 1.3 1.267 1.234 1.202 1.171 1.14 1.111 1.082 1.054 1.026 1.0 0.974 0.949 0.924 0.9 0.877 0.854 0.832 0.81 0.789 0.768 0.748 0.729 0.71 0.692 0.674 0.656 0.639 0.622 0.606 0.59 0.575 0.56 0.546

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.769" PeakHeight="110.0" Num="3" Error="0.0">
-29.989 12.402 -2.827
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.769" EndFrequency="11.0" PeakHeight="336.053" Num="5" zHalfNm="253.209" Error="2.313">
-173.739 -50.914 16.842 -7.393 1.978
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.827" Depth="0.122"/>
<TopsideChapman PeakHeight="336.053" PeakDensity="1501240.8" PeakScaleHeight="59.224" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
