<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 15:50:00.000"
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" >
2026.02.27 (058) 15:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605802271550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.558" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.183" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="486.856" 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="3.386" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="363.970" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.132" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.700" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.560" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.370" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.432" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.090" 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="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 220.000 226.000 232.000 238.000 244.000 250.000 256.000 262.000 268.000 274.000 280.000 285.000 285.000 290.000 295.000 297.500 300.000 302.500 305.000 307.500 310.000 310.000 310.000 311.875 313.750 315.625 317.500 319.375 321.250 323.125 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 355.000 355.000 360.000 365.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 417.500 420.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 457.500 460.000 460.000 460.000 460.000 462.500 465.000 467.500 470.000 473.002 476.172 479.527 483.082 486.856 490.870 495.146 499.714 504.601 509.845 515.484 521.566 528.144 535.283 543.057 551.555 560.882 571.167 582.564 595.265 609.507
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 54 0 0 0 45 0 0 0 0 0 48 48 48 51 51 0 0 0 0 0 51 48 45 0 57 0 0 0 0 0 48 48 51 54 54 54 51 0 54 54 57 60 60 57 57 60 60 57 0 60 63 60 0 63 60 54 51 63 63 45 51 63 0 51 51 57 45 54 63 66 57 63 51 57 60 60 57 63 63 60 51 57 60 54 60 63 60 63 60 60 0 54 60 57 57 48 54 57 48 54 57 48 0 60 48 54 60 51 57 60 60 54 45 51 51 51 0 48 0 45 0 42 0 0 0 0 0 0 0 0 0 0 0 0 0 0 45 51 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.953125 2.734375 -0.390625 -0.390625 2.734375 1.171875 -1.171875 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 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.953125 -1.953125 -1.953125 0.390625 0.390625 0.390625 0.390625 2.734375 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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.566 113.133 114.699 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.97 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.278 2.93 3.276 3.386 3.263 3.263 3.386 3.395 3.544 3.689 3.832 3.974 4.117 4.26 4.405 4.552 4.701 4.853 5.008 5.166 5.326 5.49 5.657 5.827 5.999 6.175 6.353 6.535 6.718 6.904 7.092 7.283 7.475 7.669 7.864 8.061 8.259 8.458 8.659 8.86 9.061 9.264 9.466 9.669 9.871 10.072 10.272 10.47 10.665 10.856 11.04 11.214 11.376 11.521 11.642 11.733 11.787 11.8 11.8 11.793 11.775 11.749 11.714 11.67 11.617 11.558 11.491 11.417 11.337 11.252 11.16 11.064 10.963 10.857 10.748 10.635 10.518 10.399 10.277 10.152 10.025 9.897 9.767 9.635 9.503 9.369 9.235 9.1 8.965 8.83 8.694 8.559 8.424 8.29 8.156 8.022 7.889 7.758 7.627 7.497 7.368 7.24 7.113 6.988 6.864 6.741 6.62 6.5 6.382 6.265 6.149 6.035 5.923 5.812 5.703 5.595 5.489 5.385 5.282 5.181 5.081 4.983 4.887 4.792 4.699 4.607 4.517 4.428 4.341 4.255 4.171 4.089 4.007 3.928 3.85 3.773 3.697 3.623 3.551 3.479 3.409 3.341 3.273 3.207 3.143 3.079 3.017 2.955 2.895 2.837 2.779 2.722 2.667 2.613 2.559 2.507 2.456 2.406 2.356 2.308 2.261 2.214 2.169 2.125 2.081 2.038 1.996 1.955 1.915 1.876 1.837 1.799 1.762 1.726 1.69 1.655 1.621 1.588 1.555 1.523 1.491 1.461 1.43 1.401 1.372 1.344

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.386" PeakHeight="110.0" Num="3" Error="0.0">
-30.497 13.147 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.386" EndFrequency="11.8" PeakHeight="363.97" Num="5" zHalfNm="262.132" Error="4.866">
-205.845 -55.922 14.476 -3.274 1.294
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.699" Depth="0.123"/>
<TopsideChapman PeakHeight="363.97" PeakDensity="1727543.4" PeakScaleHeight="74.432" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
