<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 20:20:00.000"
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: 65% PACIFIC flags: 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" >
2026.03.07 (066) 20:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603072020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.609" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.222" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="486.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.048" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="361.664" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.366" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.985" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.044" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.239" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="154">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 266.667 268.333 270.000 270.000 270.000 271.000 272.000 273.000 274.000 275.000 276.250 277.500 278.750 280.000 280.000 280.000 280.000 285.000 286.250 287.500 288.750 290.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 295.000 300.000 301.667 303.333 305.000 305.000 300.000 301.667 303.333 305.000 307.500 310.000 312.500 315.000 315.000 315.000 320.000 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 330.000 335.000 335.000 340.000 341.250 342.500 343.750 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 432.500 435.000 437.500 440.000 442.500 445.000 447.500 450.000 452.500 455.000 455.000 460.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 480.000 480.000 483.333 486.667 490.332 494.390 498.906 503.962 509.662 516.138 523.558 532.145 542.200 554.133 568.524
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 66 66 66 0 63 63 66 0 63 57 54 57 0 0 0 0 0 0 0 0 0 0 0 0 0 60 60 63 63 51 0 0 0 54 72 72 69 66 72 75 0 0 66 78 72 0 51 0 63 0 0 0 66 0 0 0 54 57 60 54 63 63 0 0 51 63 0 69 69 69 72 60 0 0 0 63 63 60 69 63 69 72 66 72 63 69 60 66 69 66 69 63 69 63 69 57 63 66 63 66 69 66 69 63 69 54 57 51 63 54 60 63 60 66 63 60 66 0 60 0 0 0 0 0 54 0 51 57 54 45 0 57 57 60 60 57 57 54 0 48 0 0 45 0 0 0 42 0 0 0 45 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 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 1.953125 -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 -1.953125 -2.734375 0.390625 -1.171875 -2.734375 -0.390625 1.953125 -0.390625 -0.390625 -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 -1.171875 -0.390625 -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" >
89.747 90.0 95.0 100.0 105.0 110.0 115.0 117.945 120.0 125.0 125.891 130.0 133.836 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 361.664 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.222 1.373 1.774 1.982 2.048 1.997 1.917 1.917 1.917 1.917 1.985 2.048 2.082 2.222 2.361 2.503 2.65 2.805 2.969 3.144 3.331 3.531 3.745 3.971 4.208 4.453 4.705 4.959 5.214 5.468 5.72 5.967 6.211 6.451 6.687 6.919 7.148 7.374 7.596 7.816 8.034 8.25 8.464 8.677 8.889 9.1 9.309 9.518 9.726 9.933 10.137 10.338 10.533 10.719 10.89 11.036 11.143 11.196 11.2 11.197 11.182 11.154 11.114 11.063 11.001 10.93 10.85 10.761 10.665 10.561 10.451 10.335 10.214 10.088 9.957 9.823 9.685 9.544 9.401 9.255 9.108 8.96 8.81 8.66 8.509 8.358 8.206 8.055 7.905 7.755 7.606 7.458 7.311 7.165 7.021 6.878 6.736 6.597 6.459 6.322 6.188 6.056 5.925 5.797 5.67 5.546 5.423 5.303 5.185 5.069 4.955 4.843 4.733 4.626 4.52 4.417 4.315 4.216 4.118 4.023 3.929 3.838 3.748 3.661 3.575 3.491 3.409 3.328 3.25 3.173 3.098 3.024 2.952 2.882 2.814 2.746 2.681 2.617 2.554 2.493 2.433 2.375 2.318 2.262 2.208 2.155 2.103 2.052 2.003 1.954 1.907 1.861 1.816 1.772 1.729 1.688 1.647 1.607 1.568 1.53 1.493 1.457 1.421 1.387 1.353 1.32 1.288 1.257 1.226 1.197 1.167 1.139 1.111 1.084 1.058 1.032 1.007 0.983 0.959 0.935 0.913 0.89 0.869 0.848 0.827 0.807 0.787

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.048" PeakHeight="110.0" Num="3" Error="0.0">
-29.141 11.215 -2.327
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.048" EndFrequency="11.2" PeakHeight="361.664" Num="5" zHalfNm="272.366" Error="4.238">
-200.35 -41.391 22.691 -12.617 3.839
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.836" Depth="0.131"/>
<TopsideChapman PeakHeight="361.664" PeakDensity="1556327.5" PeakScaleHeight="63.239" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
