<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 23:10:00.000"
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" >
2026.03.23 (082) 23:10:00</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">
FF202608203232310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.663" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.628" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="395.253" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="335.919" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.959" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.858" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.004" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.458" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 316.667 318.333 320.000 322.500 325.000 322.500 320.000 325.000 325.000 325.000 325.000 325.833 326.667 327.500 328.333 329.167 330.000 330.000 330.000 330.000 330.000 330.455 330.909 331.364 331.818 332.273 332.727 333.182 333.636 334.091 334.545 335.000 340.000 340.000 340.000 340.000 340.000 340.000 337.500 335.000 335.000 336.111 337.222 338.333 339.444 340.556 341.667 342.778 343.889 345.000 345.000 345.000 345.000 352.500 360.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 357.500 355.000 355.000 360.000 360.000 360.000 360.000 360.000 362.000 364.000 366.000 368.000 370.000 370.000 372.500 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 380.000 381.250 382.500 383.750 385.000 385.000 385.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 402.500 405.000 405.000 420.000 410.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 432.500 435.000 437.500 440.000 442.500 445.000 447.500 450.000 452.500 455.000 465.000 465.000 465.000 465.000 475.000 475.000 475.000 485.000 485.000 490.000 495.000 500.000 507.248 515.931 526.521 539.724
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
81 69 0 0 0 69 69 69 0 72 75 0 0 75 0 0 0 0 54 78 81 81 75 66 0 0 0 0 0 0 69 0 0 0 66 63 0 63 69 0 0 0 69 54 0 0 0 0 0 0 0 0 69 72 72 69 0 54 72 57 63 0 66 69 69 0 66 63 66 0 0 72 66 0 0 69 0 69 72 66 63 0 72 0 72 66 0 0 75 75 0 66 0 69 72 69 63 63 0 66 0 69 63 0 72 66 66 69 60 54 0 69 60 60 72 69 63 60 54 0 63 60 66 57 63 0 60 0 66 0 60 0 63 0 54 63 57 57 57 57 57 54 51 51 54 42 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 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 -1.171875 -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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 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 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 2.734375 0.390625 -1.171875 0.390625 1.171875 0.390625 1.953125 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.953125 1.171875 1.171875 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.429 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.857 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.286 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 395.253 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.283 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.227 0.25 0.272 0.295 0.317 0.339 0.354 0.382 0.469 0.565 0.674 0.798 0.942 1.107 1.295 1.509 1.749 2.016 2.308 2.624 2.963 3.322 3.7 4.093 4.5 4.918 5.345 5.778 6.215 6.654 7.091 7.523 7.946 8.357 8.751 9.124 9.471 9.786 10.065 10.302 10.492 10.632 10.719 10.75 10.75 10.738 10.702 10.643 10.562 10.463 10.347 10.215 10.07 9.913 9.745 9.569 9.385 9.194 8.999 8.799 8.597 8.392 8.186 7.98 7.774 7.568 7.364 7.161 6.961 6.763 6.568 6.376 6.187 6.002 5.821 5.643 5.469 5.299 5.133 4.972 4.814 4.66 4.511 4.365 4.224 4.086 3.953 3.823 3.697 3.575 3.456 3.341 3.23 3.122 3.018 2.916 2.818 2.723 2.631 2.543 2.457 2.373 2.293 2.215 2.139 2.067 1.996 1.928 1.862 1.799 1.737 1.678 1.62 1.565 1.511 1.459 1.409 1.361 1.314 1.269 1.225 1.183 1.143 1.103 1.065 1.029 0.993 0.959 0.926 0.894 0.863 0.834 0.805 0.777 0.75 0.724 0.699 0.675 0.652 0.63 0.608 0.587 0.567 0.547 0.528 0.51 0.492 0.475 0.459 0.443 0.428 0.413 0.399 0.385 0.372 0.359 0.347 0.335 0.323 0.312 0.301 0.291 0.281 0.271 0.262 0.253

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="10.75" PeakHeight="395.253" Num="5" zHalfNm="335.919" Error="2.433">
-184.458 1.088 2.362 -1.917 0.958
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.286" Depth="0.154"/>
<TopsideChapman PeakHeight="395.253" PeakDensity="1433777.9" PeakScaleHeight="44.458" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
